Denk, A. G.; Holzmann, A.; Peters, A.; Vermeirssen, E. L. M.; Kempenaers, B.: Paternity in mallards: Effects of sperm quality and female sperm selection for inbreeding avoidance. Behavioral Ecology 16 (5), pp. 825 - 833 (2005)
Denk, A. G.; Gautschi, B.; Carter, K. L.; Kempenaers, B.: Seven polymorphic microsatellite loci for paternity assessment in the mallard (Anas platyrhynchos). Molecular Ecology Notes 4 (3), pp. 506 - 508 (2004)
Peters, A.; Denk, A. G.; Delhey, K.; Kempenaers, B.: Carotenoid-based bill colour as an indicator of immunocompetence and sperm performance in male mallards. Journal of Evolutionary Biology 17 (5), pp. 1111 - 1120 (2004)