@article{ASNSP_1979_4_6_4_637_0,
     author = {Kinderlehrer, D. and Nirenberg, L. and Spruck, J.},
     title = {Regularity in elliptic free boundary problems. {II.} {Equations} of higher order},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {637--683},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 6},
     number = {4},
     year = {1979},
     mrnumber = {563338},
     zbl = {0425.35097},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1979_4_6_4_637_0/}
}