Brain Transcriptome Database (BrainTx)http://rdf.ncbi.nlm.nih.gov/pubmed/

Juan. Hou, et.al., A systematic screen for genes expressed in definitive endoderm by Serial Analysis of Gene Expression (SAGE)., BMC developmental biology, 2007, 7
http://rdf.ncbi.nlm.nih.gov/pubmed/17683524