@misc{10_1017_S0017089500020152,
     title = {ON {THE} {NUMBER} {OFCRITICAL} {POINTS} {OF} {A} {C1} {FUNCTION} {ON} {THE} {SPHERE}},
     journal = {Glasgow mathematical journal},
     pages = {283--287},
     year = {2000},
     volume = {42},
     number = {2},
     doi = {10.1017/S0017089500020152},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500020152/}
}