Thongtip, N., Saikhun, J., Mahasawangkul, S., Kornkaewrat, K., Suthanmapinanh, P. and Pinyopummin, A. (2015) “Effect of Pentoxifylline on the Motility Characteristics and Viability of Spermatozoa in Asian Elephants (Elephas maximus) with Low Semen Quality”, The Thai Journal of Veterinary Medicine, 38(3), pp. 37–45. available at: https://he01.tci-thaijo.org/index.php/tjvm/article/view/35992 (accessed: 18 September 2026).