%0 Journal Article %A V. Klee %A P. van den Driessche %T Linear Algorithms for Testing the Sign Stability of a Matrix and for Finding Z-Maximum Matchings in Acyclic Graphs. %J Numerische Mathematik %D 1977 %P 273-286 %V 28 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1977__28_132487/ %F NUMA_1977__28_132487