@article{CM_1992__83_2_147_0,
     author = {Ghione, F. and Letizia, M.},
     title = {Effective divisors of higher rank on a curve and the {Siegel} formula},
     journal = {Compositio Mathematica},
     pages = {147--159},
     publisher = {Kluwer Academic Publishers},
     volume = {83},
     number = {2},
     year = {1992},
     mrnumber = {1174422},
     zbl = {0766.14003},
     language = {en},
     url = {http://www.numdam.org/item/CM_1992__83_2_147_0/}
}