ICA

 Hi, 

I have a question about how to decide ICA component number. I am to tell my riviewer that it is based on the experience (1/3-1/4 volumes, is it right?), but I did not find the relevant references. Could you provide some references for me? thanks. And any suggestion about how to answer this reviewer's question is appreciated. 

 In my memory such statement (1/3-1/4) was in Greicius 2004 or later papers...