I don't think there is a journal article that says that. Now, me personally, during the majority of the year i.e. 10 to 11 months out of the year, I do the powerlifting lifts, because those are my contest events. I will do pullups all year round. The types of rows, tricep, bicep, dips, military press, get cycled on and off ~ 3 to 4 weeks at a time.
The reasons are:
1. injury prevention: doing the same lifts over and over, using the same movement patterns, stressing the muscles/tendons at the same joint angle, creates the potentional for overuse injuries. In the one to 2 month period when not doing powerlifting movements, I try some OLY lifts, single leg exercises etc. It is to give my body a rest from the usual.
- I cycle my assistance lifts faster, to keep me psychologically fresh and not bored. There are also a few assistance lifts that if I were to do them for 6 weeks or longer, injuries startd creeping up, so naturally, I use these lifts, then ditch them for a while.
I hope that helps.