Chemistry in disks - V. Sulfur-bearing molecules in the protoplanetary disks surrounding LkCa15, MWC480, DM Tauri, and GO TauriA. Dutrey, V. Wakelam, Y. Boehler, S. Guilloteau, F. Hersant, D. Semenov, E. Chapillon, T. Henning, V. Piétu, R. Launhardt, F. Gueth and K. SchreyerA&A, 535 (2011) A104DOI: https://doi.org/10.1051/0004-6361/201116931