Don there's a recent study in the British Journal of Nutrition that examines this (well - protein and it's timing for fullness). Excerpt:
"There is a growing body of research which supports eating high-quality protein foods when dieting to maintain a sense of fullness," said Wayne W. Campbell, PhD, study author and professor of Foods and Nutrition at Purdue University. "This study is particularly unique in that it looked at the timing of protein intake and reveals that when you consume more protein may be a critical piece of the equation."
Perhaps you could subscribe to specific journals in order to keep in the loop with the studies and areas of research you are interested in. I know how difficult it can be trying to find certain studies online. Possibly your GP, Specialist or nutritionist could advise you further.