@article{RLINA_1974_8_56_4_a19,
     author = {Charnes, Abraham and Cooper, William W.},
     title = {An {Extremal} {Principle} for {Accounting} {Balance} of a {Resource} {Value-Transfer} {Economy:} {Existence,} {Uniqueness} and {Computation}},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali},
     pages = {556--561},
     publisher = {mathdoc},
     volume = {Ser. 8, 56},
     number = {4},
     year = {1974},
     zbl = {0322.90014},
     mrnumber = {0395746},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RLINA_1974_8_56_4_a19/}
}