@incollection{PedersenLjubić, author = {Pedersen, Jaap and Ljubić, Ivana}, title = {Prize Collecting Steiner Tree Problem and its Variants}, series = {Encyclopedia of Optimization}, booktitle = {Encyclopedia of Optimization}, editor = {Pardalos, Panos M. and Prokopyev, Oleg A.}, publisher = {Springer International Publishing}, address = {Cham}, language = {en} }