TY  - JOUR
AU  - Carvalho, F. J.Craveiro de
TI  - Immersed surfaces and pencils of planes in 3-space
JO  - Glasgow mathematical journal
PY  - 1981
SP  - 133
EP  - 136
VL  - 22
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500004560/
DO  - 10.1017/S0017089500004560
ID  - 10_1017_S0017089500004560
ER  -