Thitaram, C., Pongsopawijit, P., Chansitthiwet, S., Brown, Janine L., Nimtragul, K., Boonprasert, K., Homkong, P., Mahasawangkul, S., Rojanasthien, S., Colenbrander, B., van der Weijden, G. C., and van Eerdenburg, F. J. 2009. "Induction of the ovulatory LH surge in Asian elephants (Elephas maximus): A novel aid in captive breeding management of an endangered species." Reproduction, Fertility, and Development, 21 672–678.