Bozó, László, and Tibor Csörgő. “Changes in Spring Arrival Dates of Central European Bird Species over the past 100 Years”. Acta Zoologica Academiae Scientiarum Hungaricae 66, no. 3 (August 7, 2020): 283–298. Accessed December 7, 2024. https://ojs3.mtak.hu/index.php/actazool/article/view/1699.