@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/}
}