@ARTICLE{Socha_P._Effectiveness_2012, author={Socha, P. and Janowski, T. and Rudowska, M.}, number={No 3}, journal={Polish Journal of Veterinary Sciences}, howpublished={online}, year={2012}, publisher={Polish Academy of Sciences Committee of Veterinary Sciences}, publisher={University of Warmia and Mazury in Olsztyn}, title={Effectiveness of determining the parturition date in bitches using the ultrasonographic fetometry as compared to hormonal and cytological methods}, URL={http://journals.pan.pl/Content/99063/PDF/6.pdf}, doi={10.2478/v10181-012-0069-4}, }