TY - JOUR A1 - Borndörfer, Ralf A1 - Karbstein, Marika A1 - Pfetsch, Marc T1 - The Steiner connectivity problem T2 - Mathematical Programming A Y1 - 2013 UR - https://opus4.kobv.de/opus4-zib/frontdoor/index/index/docId/4839 VL - 142 IS - 1 SP - 133 EP - 167 ER -