@article{GroetschelLovaszSchrijver1986, author = {Martin Gr{\"o}tschel and L{\´a}szlo Lov{\´a}sz and Alexander Schrijver}, title = {Relaxations of Vertex Packing}, journal = {Journal of Combinatorial Theory, Series B}, volume = {40}, pages = {330 -- 343}, year = {1986}, }