28-Way vertebrate alignment and conservation track in the UCSC Genome Browser - Miller, Webb; Rosenbloom, Kate; Hardison, Ross C.; Hou, Minmei; Taylor, James; Raney, Brian; Burhans, Richard; King, David C.; Baertsch, Robert; Blankenberg, Daniel; Kosakovsky Pond, Sergei L.; Nekrutenko, Anton; et al. (Genome Research, 2007)