1. Å. Lindström, G.H. Visser, S. Daan, "Physiol. Zool." 66, "The energetic cost of feather synthesis is proportional to basal metabolic rate." 490 (1993)
2. L. Jenni and R. Winkler "Moult and Ageing of European Passerines." (2020)
3. J.G. Bojarinova, E. Lehikoinen, T. Eeva, "J. Avian Biol." 30, "Dependence of postjuvenile moult on hatching date, condition and sex in the Great Tit." 437 (1999)
4. D. Alonso and J. Arizaga "Ring. Migr." 26, "Seasonal patterns of breeding, moulting, and body mass variation in Pyrenean Common Crossbills Loxia curvirostra curvirostra." 64 (2011)
5. Z. Barta, A.I. Houston, J.M. McNamara, et al. "Oikos." 112, "Annual routines of non-migratory birds: Optimal moult strategies." 580 (2006)