@misc{Markov_G._A_1972,
 author={Markov, G. and Christov, L. and Gliwicz, J.},
 volume={17},
 number={24},
 copyright={Rights Reserved - Free Access},
 address={Białowieża},
 journal={Acta Theriologica},
 howpublished={online},
 year={1972},
 language={eng ; Sum. ang ; pol.},
 type={Text},
 title={A population of Clethrionomys glareolus pirinus on the Vitosha Mountain, Bulgaria. I. Variations in numbers and age structure},
 URL={http://www.rcin.org.pl/Content/10115/PDF/BI002_2613_Cz-40-2_Acta-T17-nr24-327-335_o.pdf},
 keywords={age structure, Bulgaria, Clethrionomys glareolus pirinus, numbers, population structure, dynamika liczebności, struktura wiekowa},
}