@article{10_21136_AM_1993_104565,
     author = {B\"ohmer, Klaus and Grossmann, Christian},
     title = {Area of contraction of {Newton's} method applied to a penalty technique for obstacle problems},
     journal = {Applications of Mathematics},
     pages = {428--439},
     publisher = {mathdoc},
     volume = {38},
     number = {6},
     year = {1993},
     doi = {10.21136/AM.1993.104565},
     mrnumber = {1241446},
     zbl = {0797.65050},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1993.104565/}
}