@article{PM_1989_1989_1_a40,
     author = {Carbonell, Marc and Llibre, Jaume},
     title = {Sistemas c\'ubicos cordados.},
     journal = {Publicacions matem\`atiques},
     pages = {253-311},
     publisher = {mathdoc},
     volume = {33},
     number = {2},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_1989_1989_1_a40/}
}