@article{05002613,
title = {Locally unknotted spines of Heegaard splittings.},
journal = {Geometry \& Topology},
volume = {5},
year = {2005},
pages = {1573-1584},
doi = {10.2140/agt.2005.5.1573},
zbl = {1120.57007},
language = {en},
url = {http://dml.mathdoc.fr/item/05002613}
}
Johnson, Jesse. Locally unknotted spines of Heegaard splittings.. Geometry & Topology, Tome 5 (2005) pp. 1573-1584. doi : 10.2140/agt.2005.5.1573. http://gdmltest.u-ga.fr/item/05002613/