@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039361,
 author = {Sever, Silvestru  Dragomir},
 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 = {},
 note = {application/pdf},
 pages = {1--15},
 title = {Smooth normed spaces of $(BD)$-type},
 volume = {39},
 year = {1992}
}