TY - JOUR AU - Boris A. Rosenfeld TI - Differentiable functions in associative and alternative algebras and smooth surfaces in projective spaces over these algebras JO - Publications de l'Institut Mathématique PY - 2000 SP - 67 VL - _N_S_68 IS - 82 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PIM_2000_N_S_68_82_a6/ LA - en ID - PIM_2000_N_S_68_82_a6 ER -