TY - JOUR AU - Janyška, Josef TI - On the Lie algebra of vertical prolongation operators JO - Czechoslovak Mathematical Journal PY - 1982 SP - 481 EP - 487 VL - 32 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1982.101823/ DO - 10.21136/CMJ.1982.101823 LA - en ID - 10_21136_CMJ_1982_101823 ER -