- Article in journal1999. The relationships between echolocation calls, morphology and diet in insectivorous bats. Journal of Zoology, London 247 : 381-393.
- Article in journal1999. Postnatal development of the European bison spermatogenesis. Acta Theriologica 44 : 77-90. DOI: 10.4098/AT.arch.99-8 PDF
- Article in journal1999. Ekologia rysia (Lynx lynx) w Puszczy Białowieskiej. Wiadomości Ekologiczne 45 : 17-41.
- Article in journal1999. The new data about zoonotic reservoir of Babesia microti in small mammals in Poland. Acta Parasitologica 44 : 142-144.
- Article in journal1999. Feeding habits and trophic niche overlap in a Carnivora community of Hungary. Acta Theriologica 44 : 429-442. DOI: 10.4098/AT.arch.99-41 PDF
- Article in journal1999. Liczebność, rozród oraz pokarm sowy błotnej Asio flammeus w Kotlinie Biebrzańskiej. Notatki Ornitologiczne 40 : 69-77.
- Article in journal1999. Changes in prey size preferences during successive stages of foraging in the mediterranean water shrew Neomys anomalus. Behaviour 136 : 345-365.
- Article in journal1999. Food handling by the gregarious Mediterranean water shrew Neomys anomalus. Folia Zoologica 48 : 161-172.
- Article in journal1999. Variation in daily activity of the free-living Eurasian lynx (Lynx lynx) in Białowieża Primeval Forest, Poland. Journal of Zoology, London 249 : 417-425.
- Article in journal1999. Dental abnormalities in the red fox Vulpes vulpes from Poland. Acta Theriologica 44 : 393-412. DOI: 10.4098/AT.arch.99-38
