@article{RCM_1987__21_1_181776,
     author = {Alfonso G. Azpeitia},
     title = {Nonlinear {Duality} {And} {Multiplier} {Theorems.}},
     journal = {Revista colombiana de matematicas},
     pages = {13--24},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {1987},
     zbl = {0656.90098},
     url = {http://geodesic.mathdoc.fr/item/RCM_1987__21_1_181776/}
}