@article{1200789208,
author = {Nakamura, Takuji},
title = {Four-genus and unknotting number of positive knots and links},
journal = {Osaka J. Math.},
volume = {37},
number = {1},
year = {2000},
pages = { 441-451},
language = {en},
url = {http://dml.mathdoc.fr/item/1200789208}
}
Nakamura, Takuji. Four-genus and unknotting number of positive knots and links. Osaka J. Math., Tome 37 (2000) no. 1, pp. 441-451. http://gdmltest.u-ga.fr/item/1200789208/