@article{PIM_2000_N_S_68_82_a6,
     author = {Boris A. Rosenfeld},
     title = {Differentiable functions in associative and alternative algebras and smooth surfaces in projective spaces over these algebras},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {67 },
     publisher = {mathdoc},
     volume = {_N_S_68},
     number = {82},
     year = {2000},
     zbl = {1058.53013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_2000_N_S_68_82_a6/}
}