TY - JOUR AU - A. A. Martynyuk TI - Decompositions and aggregation in systems analysis JO - Theoretical and applied mechanics PY - 1975 SP - 87 VL - 1 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TAM_1975_1_1_a9/ LA - en ID - TAM_1975_1_1_a9 ER -