HUBÁLEK, Zdeněk, ČAPEK, Miroslav. Migration distance and the effect of North Atlantic Oscillation on the spring arrival of birds in Central Europe. Folia zoologica. 2008, 57(3), 212-220. ISSN 0139-7893. E-ISSN 1573-1189. Dostupné z: http://www.ivb.cz/folia/57/3/212_220.pdf