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.
Kumar and Thakur (2004) "Androgen receptor mRNA is inversely regulated by testosterone and estradiol in adult mouse brain." Neurobiol. Aging 25(7):925-933 (PubMed)