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Fitze, Patrick; Tschirren, Barbara; Gasparini, Julien; Richner, Heinz (2007). Carotenoid-based plumage colors and immune function: Is there a trade-off for rare carotenoids? The American naturalist, 169(S1), S137-S144. Chicago, Ill.: University of Chicago Press 10.1086/510094
Tschirren, Barbara; Fitze, Patrick; Richner, Heinz (2007). Maternal modulation of natal dispersal in a passerine bird: An adaptive strategy to cope with parasitism? The American naturalist, 169(1), pp. 87-93. Chicago, Ill.: University of Chicago Press 10.1086/509945
Fitze, Patrick; Tschirren, Barbara (2006). No evidence for survival selection on carotenoid-based nestling coloration in great tits (Parus major). Journal of Evolutionary Biology, 19(2), pp. 618-624. Basel: Wiley 10.1111/j.1420-9101.2005.01008.x
