@article{MM2_1991__70_1_155569,
     author = {Takao Kato and Marc Coppens},
     title = {The gonality of smooth curves with plane {Models.}},
     journal = {Manuscripta mathematica},
     pages = {5--26},
     publisher = {mathdoc},
     volume = {70},
     number = {1},
     year = {1991},
     zbl = {0725.14005},
     url = {http://geodesic.mathdoc.fr/item/MM2_1991__70_1_155569/}
}