TY - JOUR AU - R. A. Raitsin TI - The best mean square approximation, by polynomials and by entire functions of finite degree, of functions which have algebraic singular point JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1969 SP - 59 EP - 61 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1969_4_a9/ LA - ru ID - IVM_1969_4_a9 ER -