@article{M2AN_1992__26_1_177_0,
     author = {Dyn, N. and Levin, D. and Yad-Shalom, I.},
     title = {Conditions for regular $B$-spline curves and surfaces},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {177--190},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {26},
     number = {1},
     year = {1992},
     mrnumber = {1155006},
     zbl = {0755.41009},
     language = {en},
     url = {http://www.numdam.org/item/M2AN_1992__26_1_177_0/}
}