@book{GroetschelLovaszSchrijver1988, author = {Martin Gr{\"o}tschel and L{\´a}szlo Lov{\´a}sz and Alexander Schrijver}, title = {Geometric Algorithms and Combinatorial Optimization}, volume = {2}, isbn = {3-540-13624-X, 0-387-13624-X (U.S.)}, year = {1988}, }