00351nam a2200121Ia 4500082001900000100001800019245009000037260003400127300002000161490003800181500000500219700000500224  a511.6bM977.SA  aMurota, Kazuo  aSystems analysis by graphs and matroids; structural solvability and controllabilityb  aBerlinbSpringer-Verlagc1987  aix, 281p. Index  aAlgorithms and Combinatorics v 3  a  a