@article{PORMA_1997__54_1_47816,
     author = {Craveiro de Carvalho, F.J. and Robertson, S.A.},
     title = {Space curves and their duals.},
     journal = {Portugaliae mathematica},
     pages = {95--100},
     publisher = {mathdoc},
     volume = {54},
     number = {1},
     year = {1997},
     zbl = {0882.53004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1997__54_1_47816/}
}