TY - JOUR AU - A. H. Apinyan AU - I. E. Danielyan TI - A dynamic model of the environment protection problem JO - Proceedings of the Yerevan State University. Physical and mathematical sciences PY - 2005 SP - 139 EP - 141 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/UZERU_2005_2_a9/ LA - ru ID - UZERU_2005_2_a9 ER -