@article{CMH_1977__52_139714,
     author = {Henrik H. Martens},
     title = {A remark on {Abel's} {Theorem} and the mapping of linear series.},
     journal = {Commentarii mathematici Helvetici},
     pages = {557--560},
     publisher = {mathdoc},
     volume = {52},
     year = {1977},
     zbl = {0367.14012},
     url = {http://geodesic.mathdoc.fr/item/CMH_1977__52_139714/}
}