Fast molecular jet from L1157-mm M. Tafalla, R. Bachiller, B. Lefloch, N. Rodríguez-Fernández, C. Codella, A. López-Sepulcre and L. Podio A&A, 573 (2015) L2 Published online: 18 December 2014 DOI: 10.1051/0004-6361/201425255