@article{CMH_1966__41_139310,
     author = {Yoshie Katsurada},
     title = {On the {Isoperimetric} {Problem} in a {Riemann} {Space.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {18--29},
     publisher = {mathdoc},
     volume = {41},
     year = {1966},
     zbl = {0148.15801},
     url = {http://geodesic.mathdoc.fr/item/CMH_1966__41_139310/}
}