@article{GT_2004_8_2_a10, author = {Schultens, Jennifer}, title = {Heegaard splittings of graph manifolds}, journal = {Geometry & topology}, pages = {831--876}, publisher = {mathdoc}, volume = {8}, number = {2}, year = {2004}, doi = {10.2140/gt.2004.8.831}, url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2004.8.831/} }