@article{BorndoerferKarbsteinPfetsch2013, author = {Ralf Bornd{\"o}rfer and Marika Karbstein and Marc Pfetsch}, title = {The Steiner connectivity problem}, journal = {Mathematical Programming A}, volume = {142}, number = {1}, pages = {133 -- 167}, doi = {10.1007/s10107-012-0564-5}, year = {2013}, }