@article{MS2_1975__36_166403,
     author = {Nicolaas H. Kuiper},
     title = {Stable surfaces in {Euclidean} three space.},
     journal = {Mathematica Scandinavica},
     pages = {84--97},
     year = {1975},
     volume = {36},
     zbl = {0298.57017},
     url = {http://geodesic.mathdoc.fr/item/MS2_1975__36_166403/}
}