TY  - JOUR
AU  - V. HAVEL
TI  - On Collineations on Three and Four Lines in a Projective Plane (Short Communication)
JO  - Aequationes mathematicae
PY  - 1969
SP  - 397
EP  - 398
VL  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1969__2_182352/
ID  - AM2_1969__2_182352
ER  -