On the nature of outflows in intermediate-mass protostars: a case study of IRAS 20050+2720 M. T. Beltrán, R. Estalella, J. M. Girart, P. T. P. Ho and G. Anglada A&A, 481 1 (2008) 93-105 Published online: 17 January 2008 DOI: 10.1051/0004-6361:20078045