@article{AIHPA_1978__28_3_335_0,
     author = {Brill, Dieter and Flaherty, Frank},
     title = {Maximizing properties of extremal surfaces in general relativity},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {335--347},
     publisher = {Gauthier-Villars},
     volume = {28},
     number = {3},
     year = {1978},
     mrnumber = {479299},
     zbl = {0375.53002},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPA_1978__28_3_335_0/}
}