Media type: E-Article Title: Mathematical Foundations of Computer Science 2010: Improved Approximability and Non-approximability Results for Graph Diameter Decreasing Problems Contributor: Bilò, Davide; Gualà, Luciano; Proietti, Guido imprint: Springer Berlin Heidelberg, 2010 Published in: Mathematical Foundations of Computer Science 2010 Language: Not determined DOI: 10.1007/978-3-642-15155-2_15 ISSN: 0302-9743; 1611-3349 Origination: Footnote: