TY - JOUR AU - M. Yu. Kitaev TI - The existence of optimal stationary policies for semicontinuous semi-Markov decision models with respect to the average cost criterion JO - Teoriâ veroâtnostej i ee primeneniâ PY - 1981 SP - 627 EP - 629 VL - 26 IS - 3 UR - http://geodesic.mathdoc.fr/item/TVP_1981_26_3_a17/ LA - ru ID - TVP_1981_26_3_a17 ER -