TY  - JOUR
AU  - Rotondaro, Giovanni
TI  - An integral formula for closed surfaces and a generalization of $Hp$-theorem
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1988
SP  - 253
EP  - 254
VL  - 29
IS  - 2
UR  - http://geodesic.mathdoc.fr/item/CMUC_1988_29_2_a6/
LA  - en
ID  - CMUC_1988_29_2_a6
ER  -