Voice and daytime calling of Scops Owls (Otus scops)
Mikkola, Anita, Mikkola, Heimo
The northern hawk owl Surnia ulula invasions in Europe
Mikkola, Heimo, Rajala, Esko, Väli, Ülo, Keišs, Oskars, Jusys, Vytautas, Kwieciński, Zbigniew, Dombrovski, Valery, Krüger, Thorsten, Hušek, Jan, Pačenovský, Samuel, Kuzmenko, Yuriy, Kuzmenko, Tatiana