@ARTICLE{Rypuła_K._Reduction_2013, author={Rypuła, K. and Płoneczka-Janeczko, K. and Bania, J. and Wałecka, E. and Bierowiec, K. and Rozpędek, W.}, number={No 2}, journal={Polish Journal of Veterinary Sciences}, howpublished={online}, year={2013}, publisher={Polish Academy of Sciences Committee of Veterinary Sciences}, publisher={University of Warmia and Mazury in Olsztyn}, title={Reduction of prevalence of persistent BVDV infection in cattle herds by long-term vaccination program (preliminary clinical study)}, URL={http://journals.pan.pl/Content/99161/PDF/23.pdf}, doi={10.2478/pjvs-2013-0051}, }