1.
Enrichment study in three captive polar bears (Ursus maritimus) at Aalborg Zoo. Genet. Biodiv. J [Internet]. 2021 Jun. 1 [cited 2025 Sep. 22];5(3):97-106. Available from: https://journals.univ-tlemcen.dz/GABJ/index.php/GABJ/article/view/149