@article{GT_2015_19_5_a1,
     author = {Gay, David T and Kirby, Robion},
     title = {Indefinite {Morse} 2{\textendash}functions : {Broken} fibrations and generalizations},
     journal = {Geometry & topology},
     pages = {2465--2534},
     publisher = {mathdoc},
     volume = {19},
     number = {5},
     year = {2015},
     doi = {10.2140/gt.2015.19.2465},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2015.19.2465/}
}