Drachmann, J., T. D. Als, and J. J. Boomsma. “Hatching Asynchrony in Linnets: The Effects of Nest Predation and Food Demand of Nestlings”. Ornis Fennica, vol. 77, no. 4, Dec. 2000, pp. 155–167, https://ornisfennica.journal.fi/article/view/133538.