@article{GroetschelMartinWeismantel1996, author = {Martin Gr{\"o}tschel and Alexander Martin and Robert Weismantel}, title = {Packing Steiner trees: Polyhedral Investigations}, journal = {Mathematical Programming, Series A}, volume = {72}, number = {2}, pages = {101 -- 123}, doi = {10.1007/BF02592085}, year = {1996}, }