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.
Baker and Board (1987) "The human ubiquitin gene family: structure of a gene and pseudogenes from the Ub B subfamily." Nucleic Acids Res. 15(2):443-463 (PubMed)