The phrase "a past reference" is correct and usable in written English.
It can be used when discussing something that refers to a previous time or event.
Example: "In her essay, she made a past reference to the historical events of World War II to support her argument."
Alternatives: "a historical reference" or "a previous mention".
Historical baselines are calculated by extrapolating the mean relative rate of deforestation and its associated emissions over a past reference period linearly into the commitment period.
When an aspectual adverb reng or hai appears before, and thus modifies, keneng intended as a non-root modal for the past, it requires that the relevant possibility had continued up to a past reference time.
Supplementary file 1 lists the plasmids used, their lab names, description and notes their first appearance in the figures and the corresponding label, and provides a past reference, where available.
Begin the proposal by cordially addressing your employer and stating the purpose of your communication, referencing any past references to salary negotiation as necessary.
Mr. Hagel's past reference to "the Jewish lobby" has been widely criticized, and he has apologized for it.
Out have gone past references to the Canadian flag as a "red rag".
And though Ms. Parker grilled past references, she noted, "No one's giving a reference unless it's good".
Objects from his past, references to other records, crop up around him.
Past references to his wars being conducted under "God's guidance" and "left to God's judgment" leave cabinet government in a fix.
We would like to reference a past ECE 476 project (Loucetios Lighting control system by Eric Okawa, Marcelo Garza, and Abhijeet Agarwal) for the stepper motor implementation.
To do so, Alice creates a transaction on her computer that must reference a past transaction on the blockchain in which she received sufficient funds, as well as her private key to the funds and Bob's address.
