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.
Isidori et al. (2000) "Leptin and aging: correlation with endocrine changes in male and female healthy adult populations of different body weights." J. Clin. Endocrinol. Metab. 85(5):1954-1962 (PubMed)