@article{JRAM_1991__414_153297,
     author = {Kunio Sakamoto},
     title = {Stability of the equator map.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {23},
     publisher = {mathdoc},
     volume = {414},
     year = {1991},
     zbl = {0731.58020},
     language = {un},
     url = {https://geodesic-test.mathdoc.fr/item/JRAM_1991__414_153297/}
}