Alvarez, R.H. et al. 1998. Effect of charcoal-treated bovine follicular fluid on the secretion of FSH in ovariectomized and intact prepubertal heifers. Brazilian Journal of Veterinary Research and Animal Science. 35, 5 (Jan. 1998), 215–217. DOI:https://doi.org/10.1590/S1413-95961998000500004.