- Article in journal2009. Spotkanie teorii Darwina z genetyką. Kosmos 61 (3-4) : 315-317.
- Popular article2009. Żubr litewski w wiekach średnich. Matecznik 1-2 : 15-16.
- Article in journal2009. Scramble and contest competition, unequal resource partitioning and resource monopolization as determinants of population dynamics. Evolutionary Ecology Research 11 : 371-380.
- Article in journal2009. Predation has a greater impact in less productive environments: variation in roe deer, Capreolus capreolus, population density across Europe. Global Ecology and Biogeography 18 : 724-734. DOI: 10.1111/j.1466-8238.2009.00480.x
- Article in journal2009. Spatial interactions between grey wolves and Eurasian lynx in Białowieża Primeval Forest, Poland. Ecological Research 24 : 207-214. DOI: 10.1007/s11284-008-0496-y
- Article in journal2009. Trade-offs between activity and thermoregulation in a small carnivore, the least weasel Mustela nivalis. Proceedings of the Royal Society of London, Series B – Biological Sciences 276 : 1921-1927. DOI: 10.1098/rspb.2008.1936
- Article in journal2009. Over seasonal and sex-independent expression of kappa casein gene (CSN3) in mammalian blood lymphocytes. Biochemical Genetics 47 : 602-608. DOI: 10.1007/s10528-009-9253-3
- Book2009. Animals and roads. Methods of mitigating the negative impact of roads on wildlife. Mammal Research Institute PAS, Białowieża
- Book chapter2009. The Białowieża bison. In: Białowieża National Park, know it, understand it, protect it. Eds. Okołów C, Karaś M, Bołbot A. Białowieski Park Narodowy, Białowieża : 111-126.
- Book chapter2009. Mammals. In: Białowieża National Park, know it, understand it, protect it. Eds. Okołów C, Karaś M, Bołbot A. Białowieski Park Narodowy, Białowieża : 127-142.