Authors: Krokene, C Lifjeld, JT

Citation: C. Krokene et Jt. Lifjeld, Variation in the frequency of extra-pair paternity in birds: A comparison of an island and a mainland population of blue tits, BEHAVIOUR, 137, 2000, pp. 1317-1330

Authors: Lifjeld, JT Aas, CK Birkhead, TR Fletcher, F Krokene, C Rigstad, K

Citation: Jt. Lifjeld et al., Variation in the number of spermatozoa in Blue Tit and Great Tit eggs, AUK, 117(1), 2000, pp. 246-249

Authors: Krokene, C Rigstad, K Dale, M Lifjeld, JT

Citation: C. Krokene et al., The function of extrapair paternity in blue tits and great tits: good genes or fertility insurance?, BEH ECOLOGY, 9(6), 1998, pp. 649-656