@article{1256053309,
author = {Jaco, William and McMillan, D. R.},
title = {Retracting three-manifolds onto finite graphs},
journal = {Illinois J. Math.},
volume = {14},
number = {4},
year = {1970},
pages = { 150-158},
language = {en},
url = {http://dml.mathdoc.fr/item/1256053309}
}
Jaco, William; McMillan, D. R. Retracting three-manifolds onto finite graphs. Illinois J. Math., Tome 14 (1970) no. 4, pp. 150-158. http://gdmltest.u-ga.fr/item/1256053309/