@misc{Halle_S._Population_1987,
 author={Halle, S. and Lehmann, U.},
 volume={32},
 number={2},
 copyright={Rights Reserved - Free Access},
 journal={Acta Theriologica},
 address={Białowieża},
 howpublished={online},
 year={1987},
 language={eng ; streszcz. eng. ; pol.},
 title={Population dynamics and individual features during the phase of decline in the field vole},
 type={Text},
 URL={http://www.rcin.org.pl/Content/11231/PDF/BI002_2613_Cz-40-2_Acta-T32-nr2-21-29_o.pdf},
 keywords={population dynamics, Microtus agrestis, migration, numbers, phase of decline, sexual activity, dynamika populacji, liczebność, cykl populacyjny, Nornik bury, aktywność płciowa, fazy spadku liczebności},
}