Gardner, Wilford; Gundersen, Jens K; Morrison, John M (2003): Mixed layer depths. United States JGOFS Process Study Data 1989-1998; CD-ROM volume 1, version 2, Woods Hole Oceanographic Institution, USA: U.S. JGOFS Data Management Office
Gardner, Wilford (1997): Notes about mixed layer depths. US JGOFS (Joint Global Ocean Flux Study) Data System, http://store.pangaea.de/Projects/JGOFS/US/ArabianSea/Gardner_mixed.htm