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@article{ELMA_1989__44_3_141464, author = {B\'ela Bollob\'as}, title = {An extension of the isoperimetric inequality on the sphere.}, journal = {Elemente der Mathematik}, pages = {121--124}, publisher = {mathdoc}, volume = {44}, number = {3}, year = {1989}, zbl = {0714.52003}, url = {http://geodesic.mathdoc.fr/item/ELMA_1989__44_3_141464/} }
Béla Bollobás. An extension of the isoperimetric inequality on the sphere.. Elemente der Mathematik, Tome 44 (1989) no. 3, pp. 121-124. http://geodesic.mathdoc.fr/item/ELMA_1989__44_3_141464/