2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/10185We present fully three-dimensional hydrodynamical and magnetohydrodynamical simulations of supersonic, radiative cooling jets propagating into homogeneous and stratified environments based on Smoothed Particle Hydrodynamics technique.7 pages (including 4 figures), uuencoded and compressed PostScript file. Accepted for publication in Astrophysical Letters & CommunicationsAstrophysicstext