Guglielmo Roma Marco Sardiello Gilda Cobellis Pedro Cruz Giampiero Lago Remo Sanges Elia Stupka The UniTrap resource: tools for the biologist enabling optimized use of gene trap clones. 741-746 2008 36 Nucleic Acids Research Database-Issue http://dx.doi.org/10.1093/nar/gkm825 db/journals/nar/nar36.html#RomaSCCLSS08