Media type: E-Article Title: Two Loop Superstring Amplitudes and S 6 Representations Contributor: Cacciatori, Sergio Luigi; Dalla Piazza, Francesco imprint: Springer Science and Business Media LLC, 2008 Published in: Letters in Mathematical Physics Language: English DOI: 10.1007/s11005-007-0213-8 ISSN: 0377-9017; 1573-0530 Keywords: Mathematical Physics ; Statistical and Nonlinear Physics Origination: Footnote: