Media type: E-Article Title: Automata, Languages, and Programming: On Integrality Ratios for Asymmetric TSP in the Sherali-Adams Hierarchy Contributor: Cheriyan, Joseph; Gao, Zhihan; Georgiou, Konstantinos; Singla, Sahil imprint: Springer Berlin Heidelberg, 2013 Published in: Automata, Languages, and Programming Language: Not determined DOI: 10.1007/978-3-642-39206-1_29 ISSN: 0302-9743; 1611-3349 Origination: Footnote: