Emission lines from rotating proto-stellar jets with variable velocity profiles - I. Three-dimensional numerical simulation of the non-magnetic caseA. H. Cerqueira, P. F. Velázquez, A. C. Raga, M. J. Vasconcelos and F. De ColleA&A, 448 1 (2006) 231-241DOI: https://doi.org/10.1051/0004-6361:20054110