Two-step oligoclonal development of male germ cells.
Proc Natl Acad Sci U S A. 2009 Jan 6;106(1):175-80. doi: 10.1073/pnas.0810325105. Epub 2008 Dec 19.
Proc Natl Acad Sci U S A. 2009.
PMID: 19098099
Free PMC article.