PATHAK, R. et al. 2020. Association of peripartum progesterone, estradiol, cortisol, PGFM and relaxin concentrations with retention of fetal membranes in crossbred dairy cows. The Indian Journal of Animal Sciences. 90, 7 (Oct. 2020), 993–997. DOI:https://doi.org/10.56093/ijans.v90i7.106668.