Szőke, Zsuzsanna, et al. “Effect of Maternal Investments on the Offsprings, in Special Respect to the Influence of Stress in Birds: Irodalmi áttekintés”. Animal Welfare, Ethology and Housing Systems (AWETH), vol. 5, no. 2, June 2009, pp. 149-7, https://journal.uni-mate.hu/index.php/aweth/article/view/6849.