Vidal, Eléxio, et al. “Effect of Ammonia on the Artificial Fertilization of Oocytes and Early Development of Jundia (Rhamdia Quelen, Siluriformes, Heptapteridae)”. Semina: Ciências Agrárias, vol. 34, no. 5, Oct. 2013, pp. 2447-56, doi:10.5433/1679-0359.2013v34n5p2447.