Martin Ringwald Janan T. Eppig James A. Kadin Joel E. Richardson GXD: a Gene Expression Database for the laboratory mouse: current status and recent enhancements. 115-119 2000 28 Nucleic Acids Research 1 db/journals/nar/nar28.html#RingwaldEKR00 http://dx.doi.org/10.1093/nar/28.1.115