Rohenkohl, Marina Menoncin Weschenfelder, et al. “Paraoxonase Activity in the Serum of Peripartum Dairy Cows With Different Placental Lactogen Concentrations”. Semina: Ciências Agrárias, vol. 38, no. 5, Oct. 2017, pp. 3371-6, doi:10.5433/1679-0359.2017v38n5p3371.