In my dissertation, I compare my results to the ABC model presented by John Doe. It seems excessive to include a reference every time I have a statement such as,
Compared to ABC, our results show a much larger size distribution.
Unlike the related question, How do I cite same reference multiple times in a paper?, in my situation, I am not referencing new information about the model contained in the publication describing the model; I am just referring to the model. I am inclined to only include a reference the first time I introduce the ABC model. Should I instead include a reference every time I refer to it?
My real issue is that it seems appropriate to include a citation for some of the references but at some point it will become excessive. For example, if I only refer to the DEF model in my introduction and conclusion, but the ABC model 50 times throughout the text, do I only reference each one once, or reference both of them every time.