@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039637,
 author = {Morimoto, Hiroko},
 issue = {1},
 journal = {Journal of the Faculty of Science, the University of Tokyo. Sect. 1 A, Mathematics = 東京大学理学部紀要. 第1類A, 数学},
 month = {Mar},
 pages = {57--64},
 title = {Une remarque sur l'operateur gradient},
 volume = {28},
 year = {1981}
}