TY - JOUR AU - Kowalski, Oldřich TI - Orbits of transformation groups on certain Grassmann manifolds JO - Czechoslovak Mathematical Journal PY - 1968 SP - 144 EP - 177 VL - 18 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1968.100818/ DO - 10.21136/CMJ.1968.100818 LA - en ID - 10_21136_CMJ_1968_100818 ER -