Media type: E-Article Title: Approximation and Online Algorithms: Approximating the Quadratic Knapsack Problem on Special Graph Classes Contributor: Pferschy, Ulrich; Schauer, Joachim imprint: Springer International Publishing, 2014 Published in: Approximation and Online Algorithms (2014), Seite 61-72 Language: Not determined DOI: 10.1007/978-3-319-08001-7_6 ISSN: 0302-9743; 1611-3349 Origination: Footnote: