TY  - JOUR
AU  - J.F. Rigby
TI  - Collineations on Quadrilaterals in Projective Planes. (Short Communication).
JO  - Aequationes mathematicae
PY  - 1968
SP  - 318
EP  - 320
VL  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1968__1_135996/
ID  - AM2_1968__1_135996
ER  -