Triwutanon, S., and T. Rukkwamsuk. “Factors Associated With Negative Energy Balance in Periparturient Dairy Cows Raised under Tropical Climate of Thailand—A Mini-Review”. Journal of Advanced Veterinary and Animal Research, vol. 8, no. 3, Sept. 2021, pp. 378-87, https://banglajol.info/index.php/JAVAR/article/view/76373.