@article{GDZPPN002237237,
title = {A finite graphic calculus for 3-manifolds.},
journal = {Manuscripta mathematica},
volume = {86},
year = {1995},
pages = {291-310},
zbl = {0856.57009},
url = {http://dml.mathdoc.fr/item/GDZPPN002237237}
}
Benedetti, Riccardo; Petronio, Carlo. A finite graphic calculus for 3-manifolds.. Manuscripta mathematica, Tome 86 (1995) pp. 291-310. http://gdmltest.u-ga.fr/item/GDZPPN002237237/