Janiga, M. and Višňovská, Z. (2004) “The placement and the size and shape of nests of Ring Ouzel (Turdus torquatus) reflect the environmental conditions at different altitude”, Oecologia Montana, 13(1-2), pp. 11-16. Available at: https://om.vuvb.uniza.sk/index.php/OM/article/view/173 (Accessed: 22February2019).