00427nam a2200133Ia 4500020001500000082001900015100004500034245008200079260002800161300002900189490003700218500000500255700003300260  a3528067624  a511.5bP965.ST  aPromel, Hans Jurgen and Steger, Angelika  aThe Steiner tree problem; a tour through graphs, algorithms, and complexityb  aWiesbadenbViewegc2002  aviii, 241p. Bibl. Index.  aAdvanced lectures in Mathematics  a  aSteger, Angelika ; jt. auth.