@Article{GroetschelMartinWeismantel96c,
author = "M.~Gr{\"o}tschel and A.~Martin and R.~Weismantel",
title = "Packing {S}teiner trees: Further facets",
journal = "European Journal on Combinatorics",
year = "1996",
volume = "17",
pages = "39 -- 52",
}