@article{MZ_1993__212_4_174511,
     author = {Joaqu{\'\i}n Ortega and Joan F\`abrega},
     title = {Extension of {At-jets} form holomorphic submanifolds.},
     journal = {Mathematische Zeitschrift},
     pages = {637--656},
     publisher = {mathdoc},
     volume = {212},
     number = {4},
     year = {1993},
     zbl = {0790.32007},
     url = {http://geodesic.mathdoc.fr/item/MZ_1993__212_4_174511/}
}