@article{MM2_1987__59_155255,
     author = {F\'elix de Delgado de la Manta},
     title = {The semigroup of values of acurve singularity with several branches.},
     journal = {Manuscripta mathematica},
     pages = {347--374},
     publisher = {mathdoc},
     volume = {59},
     year = {1987},
     zbl = {0611.14025},
     url = {http://geodesic.mathdoc.fr/item/MM2_1987__59_155255/}
}