TY - JOUR AU - V. G. Il'ichev TI - Convex structures in ecological models JO - Matematičeskoe modelirovanie PY - 2007 SP - 90 EP - 102 VL - 19 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MM_2007_19_4_a7/ LA - ru ID - MM_2007_19_4_a7 ER -