Korňan, M. “Interspecific Foraging Substrate Preferences Among Flycatchers in a Primeval Mixed Forest (Šrámková National Nature Reserve)”. Oecologia Montana, Vol. 9, no. 1-2, Dec. 2000, pp. 36-43, https://om.vuvb.uniza.sk/index.php/OM/article/view/120.