%0 Journal Article %A Dziech, Andrzej %A Pach, Andrzej R. %T Bounds on the throughput of an unslotted ALOHA channel in the case of a heterogeneous users' population %J Kybernetika %D 1989 %P 476-485 %V 25 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1989__25_6_a4/ %G en %F KYB_1989__25_6_a4