@article{M2AN_1976__10_2_39_0,
     author = {Falk, Richard S.},
     title = {A {Ritz} method based on a complementary variational principle},
     journal = {Revue fran\c{c}aise d'automatique, informatique, recherche op\'erationnelle. Analyse num\'erique},
     pages = {39--48},
     publisher = {Dunod},
     address = {Paris},
     volume = {10},
     number = {R2},
     year = {1976},
     mrnumber = {433915},
     zbl = {0363.65084},
     language = {en},
     url = {http://archive.numdam.org/item/M2AN_1976__10_2_39_0/}
}