@article{1029002727,
author = {Livingston, Charles},
title = {Surfaces bounding the unlink.},
journal = {Michigan Math. J.},
volume = {29},
number = {1},
year = {1982},
pages = { 289-298},
language = {en},
url = {http://dml.mathdoc.fr/item/1029002727}
}
Livingston, Charles. Surfaces bounding the unlink.. Michigan Math. J., Tome 29 (1982) no. 1, pp. 289-298. http://gdmltest.u-ga.fr/item/1029002727/