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.
Solana et al. (1999) "Natural killer cells in healthy aging." Exp. Gerontol. 34(3):435-443 (PubMed)