@article{MAN_1985__270_182958,
     author = {Gerhard Str\"ohmer},
     title = {About the {Morse} {Theory} for {Certain} {Variational} {Problems.}},
     journal = {Mathematische Annalen},
     pages = {275--284},
     publisher = {mathdoc},
     volume = {270},
     year = {1985},
     zbl = {0537.35006},
     url = {http://geodesic.mathdoc.fr/item/MAN_1985__270_182958/}
}