TY - JOUR AU - Béla Bollobás TI - An extension of the isoperimetric inequality on the sphere. JO - Elemente der Mathematik PY - 1989 SP - 121 EP - 124 VL - 44 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ELMA_1989__44_3_141464/ ID - ELMA_1989__44_3_141464 ER -