@article{EXMATH_1993_1993_1_a21,
     author = {Sarfraz, Muhammad},
     title = {Interpolaci\'on c\'ubica racional con preservaci\'on de la forma.},
     journal = {Extracta mathematicae},
     pages = {106-111},
     publisher = {mathdoc},
     volume = {8},
     number = {2-3},
     year = {1993},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1993_1993_1_a21/}
}