@article{MM2_1991__71_3_155616,
     author = {John R. Klein},
     title = {Coordinate morse theory.},
     journal = {Manuscripta mathematica},
     pages = {283--294},
     publisher = {mathdoc},
     volume = {71},
     number = {3},
     year = {1991},
     zbl = {0727.58010},
     url = {http://geodesic.mathdoc.fr/item/MM2_1991__71_3_155616/}
}