$a Monografia fauny Babiej Góry / red. Bronisław W. Wołoszyn, Danuta Wołoszyn, Waldemar Celary. - Kraków, cop. 2003.
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$a Kp. Apoidea (Hymenoptera) caught in yellow trips during spring and summer in agricultural landscape near Wrocław (Lower Silesia, Poland) / Beata Gabryś, Waldemar Celary and Grażyna Sobota. - Warszawa, 2003.