@article{KYB_2003_39_2_a12,
     author = {Gondran, Michel and Saade, Rita Hoblos},
     title = {Complex calculus of variations},
     journal = {Kybernetika},
     pages = {249--263},
     year = {2003},
     volume = {39},
     number = {2},
     mrnumber = {1996561},
     zbl = {1249.49002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_2003_39_2_a12/}
}