The phrase "as reference sources" is correct and usable in written English.
It can be used when discussing materials or documents that provide information or support for a particular topic or argument.
Example: "In my research paper, I will include several books and articles as reference sources to support my thesis."
Alternatives: "as informational resources" or "as citation materials".
"Websites will be largely redundant, except as reference sources.
As reference sources, equivalent samples were investigated from the coresident Han majority population.
This package uses Google and Stamen Maps as reference sources for geocoding and mapping.
The British National Formulary for Children (BNFC) and Neofax were used as reference sources.
Thus, when UniProt or TrEMBL are used as reference sources, a higher proportion of Sma3s annotations are TrEMBL-derived, which consequently lowers the average annotation accuracy.
We further explored the TF genes in each TFBSs family, examining expression data to determine whether they were expressed in human or mouse adipose, hypothalamus and pancreas islet (using BioGPS database http://biogps.gnf.org and our own BAIR data as reference sources).
The unique aspect of the method is the use of estimated source signals identified via beamforming as reference source signals in the decomposition procedure.
These results will serve as reference source for urban planning, regeneration, land resources management, urban architectural design and layout, optimisation of the ecological environment, and construction of liveable cities.
Regarding the N and Sb contents, a power of 140 W for the RF plasma source and a temperature of 335°C for the Sb effusion cell were chosen as reference source conditions.
In this first phase of the project hyper-textbooks have been designed and implemented to be used mostly as self-reference sources.
As a would-be wordsmith, I wanted to be the writer of every sentence in my pieces large and small, so (like most of the other writers in the "back of the book") I used the reporters' files as references and sources of quotes but did not cobble pieces together from this chunk and that chunk of other people's words.
