@article{FORUM_1992__4_6_141666,
     author = {Maria Rita Casali},
     title = {A combinatorial characterization of 4-dimensional handlebodies.},
     journal = {Forum mathematicum},
     pages = {123--134},
     publisher = {mathdoc},
     volume = {4},
     number = {6},
     year = {1992},
     zbl = {0743.57013},
     url = {http://geodesic.mathdoc.fr/item/FORUM_1992__4_6_141666/}
}