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Brinkhof, M.W.G.; Heeb, P; Kolliker, M; Richner, Heinz (1999). Immunocompetence of nestling great tits in relation to rearing environment and parentage. Proceedings of the Royal Society. Series B - biological sciences, 266(1435), pp. 2315-2322. London: Royal Society of London 10.1098/rspb.1999.0925
Heeb, P; Werner, I; Kolliker, M; Richner, Heinz (1998). Benefits of Induced Host Responses against an Ectoparasite. Proceedings of the Royal Society. Series B - biological sciences, 265(1390), pp. 51-56. London: Royal Society of London 10.1098/rspb.1998.0263
