@article{GroetschelMartinWeismantel1996, author = {Martin Gr{\"o}tschel and Alexander Martin and Robert Weismantel}, title = {Packing Steiner Trees: Further Facets}, journal = {European Journal of Combinatorics}, volume = {17}, number = {1}, pages = {39 -- 52}, doi = {10.1006/eujc.1996.0004}, year = {1996}, }