- Article in journal2001. Summer abundance and habitat distribution of frogs (Rana temporaria, R. arvalis R. kl. esculenta) and toads (Bufo bufo) in the Białowieża Primeval Forest, E Poland. Folia Zoologica 50 : 65-73.
- Article in journal2001. Accuracy of radio-tracking to estimate activity and distances walked by European bison in the Białowieża Forest, Poland. Acta Theriologica 46 : 319-326.
- Article in journal2001. Habitat preferences of water shrews and root vole coexisting along a stream in Białowieża Forest. Säugetierkundliche Informationen 5 (25) : 99-112.
- Article in journal2001. Summer roots sites of Myotis brandtii (Eversmann, 1845) (Chiroptera, Vespertilionidae) in eastern Poland. Mammalia 65 (4) : 531-535.
- Article in journal2001. Impact of human activity on daily movement patterns of wolves, Canis lupus, in the Białowieża Forest, Poland. In: Wildlife, Land and People: priorities for the 21st century. Eds. Field R et al.. The Wildlife Society, Maryland, USA : 206-208.
- Book chapter2001. Influence of supplementary winter feeding in the daily travel distance of European bison in the Białowieża Forest, Poland. In: Wildlife, Land and People: priorities for the 21st century. Eds. Field R et al. The Wildlife Society, Maryland, USA : 315-316.
- Article in journal2001. Seasonal and sexual variation in diel activity rhythms of pine marten Martes martes in the Białowieża National Park (Poland). Acta Theriologica 46 : 295-304. PDF
- Article in journal2001. Obserwacje wędrujących larw muchówek z rodziny Sciaridae (Diptera) w Polsce. Wiadomości Entomologiczne 19 : 171-178.
- Book2001. Ekologia zwierząt drapieżnych Puszczy Białowieskiej. Wydawnictwo naukowe PWN, Warszawa
- Book chapter2001. Sorex caecutiens Laxmann, 1788 - Ryjówka średnia (r. białowieska). In: Polska Czerwona Księga Zwierząt. Kręgowce. Eds. Głowaciński Z. PWRiL, Warszawa : 41-42.
