@incollection{BorndoerferHoangKarbsteinetal.2013, author = {Ralf Bornd{\"o}rfer and Nam-Dung Hoang and Marika Karbstein and Thorsten Koch and Alexander Martin}, title = {How many Steiner terminals can you connect in 20 years?}, booktitle = {Facets of Combinatorial Optimization; Festschrift for Martin Gr{\"o}tschel}, editor = {Michael J{\"u}nger and Gerhard Reinelt}, pages = {215 -- 244}, doi = {10.1007/978-3-642-38189-8_10}, year = {2013}, }