at senescence.info
You can search for any reference by title, author, date, editor, journal and publisher. Searching is case insensitive, and allows for only partial terms (e.g. seq with pickup both RNA-Seq and sequencing) matching. You can also use advanced queries that are detailed here.
Sakai et al. (1991) "Oncogenic germ-line mutations in Sp1 and ATF sites in the human retinoblastoma gene." Nature 353(6339):83-86 (PubMed)