Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
a reference over
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "a reference over" is not correct and does not convey a clear meaning in written English.
It is unclear when it could be used, as it lacks context and proper grammatical structure. Example: "I need a reference over the project details" does not make sense.
⚠ May contain grammatical issues
Science
News & Media
Alternative expressions(4)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
1 human-written examples
Using normative data from children in the United States as a reference, over a 10-year period in urban areas, there was a slight reduction in the prevalence of underweight children and those with stunting, and a marked increase in overweight and obese children 3.0 versus 5.7% (p<0.001).
Human-verified similar examples from authoritative sources
Similar Expressions
59 human-written examples
When he repeated it, the crowd filled in the missing word: "Schlonged!"—a reference to Obama's victory over Hillary Clinton in the 2008 Democratic primary.
News & Media
The letter referenced "over a dozen female celebrities, actresses, models and athletes" whose photos had been stolen, without mentioning specific names.
News & Media
In the feed-forward path, a learning control rule/strategy is exploited to track the entire span of a reference input over a sequence of iterations.
Science
In addition, an electrical power circuit is used to show the applicability of the algorithms to engineering problems requiring a precise tracking of a reference profile over a long time range despite disturbances, unmodelled dynamics, and parameter uncertainty.
More specifically, on the previously created template, we traced a curve within the posterior cingulate cortex, using the callosal curve as a reference, and over this line we placed 4 equispaced ROIs.
Science
Two-color microarray hybridizations were performed according to a reference design over the three biological replicates from each genotype.
Science
Furthermore, plotting a reference range over time, as in Figure 1, shows the increase in PSA level expected with advancing age in a healthy man.
Science
When assessing the performance of a new technology in measuring regulated variables, a sufficiently large number of measurements should be compared with a reference method over an adequately wide range of values.
Science
Given the difficulty of manufacturing nanoparticles and the dynamic nature of the industry, relying on one company to provide a reference material over a period of years was deemed inadvisable.
The objective of the phase III GLOW2 study was to evaluate the efficacy and safety of NVA237 50 μg q.d. in patients with moderate-to-severe COPD compared with placebo and with tiotropium (as a reference comparator) over a longer treatment period of 52 weeks.
Science
Expert writing Tips
Best practice
Avoid using the phrase "a reference over" in formal writing. Opt for clearer alternatives like "a reference regarding", "a reference to", or "a reference about" depending on the context.
Common error
A common mistake is using "over" to indicate the subject of a reference. While sometimes found in informal contexts, it's grammatically unconventional. Ensure clarity by choosing prepositions like "to", "regarding", or "about" to specify what the reference pertains to.
Source & Trust
81%
Authority and reliability
2.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a reference over" functions as a noun phrase that attempts to specify the subject or scope of a reference. However, as Ludwig AI points out, it is not grammatically correct and its meaning is often unclear.
Frequent in
Science
36%
News & Media
32%
Formal & Business
11%
Less common in
Reference
5%
Wiki
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, the phrase "a reference over" is grammatically questionable and lacks clarity in formal English. As Ludwig AI indicates, it's advisable to avoid this phrase and opt for more precise alternatives like "a reference to", "a reference regarding", or "a reference about". While it may appear in some contexts, particularly in science and news media, its usage is inconsistent and can lead to misinterpretation. Therefore, prioritizing grammatical correctness and clarity is essential in effective communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
a reference regarding
Replaces 'over' with 'regarding' to indicate the subject matter of the reference.
a reference concerning
Uses 'concerning' instead of 'over' to specify what the reference pertains to.
a reference about
Substitutes 'over' with 'about' for a more common and grammatically sound construction.
a reference to
Employs 'to' to clearly indicate that the reference is directed towards something.
a source for reference regarding
Adds 'source for reference' to emphasize the role of the point of reference.
a benchmark for
Uses 'benchmark' as an alternative to 'reference', highlighting a standard for comparison.
a standard by which to measure
Replaces 'reference' with 'standard' and includes 'by which to measure' to clarify its purpose.
a point of comparison for
Expresses the idea as 'point of comparison' for clearer understanding.
a frame of reference
Uses a broader phrase 'frame of reference' to denote a set of criteria or values.
in reference to
Uses 'in reference to', a prepositional phrase, instead of 'a reference over'.
FAQs
What are some alternatives to "a reference over"?
You can use alternatives like "a reference regarding", "a reference to", or "a reference about" depending on the context.
Is "a reference over" grammatically correct?
No, the phrase "a reference over" is generally considered grammatically incorrect. It's better to use more precise prepositions like "to", "regarding", or "concerning" to clarify the relationship between the reference and the subject.
When is it appropriate to use "a reference over"?
While you might encounter "a reference over" in some informal contexts, it's advisable to avoid it in formal writing. Opt for clearer and more widely accepted alternatives to ensure effective communication.
What's the difference between "a reference over" and "a reference to"?
"A reference over" is not a standard or grammatically recommended phrase. Instead, use "a reference to" to indicate that the reference relates to a specific subject or topic.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
81%
Authority and reliability
2.5/5
Expert rating
Real-world application tested