@article{JRAM_1967__227_150804,
     author = {Henrik H. Martens},
     title = {On the varieties of special divisors on a curve.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {111--120},
     publisher = {mathdoc},
     volume = {227},
     year = {1967},
     zbl = {0172.46301},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1967__227_150804/}
}