TY - JOUR AU - A. D. Valiev AU - A. S. Demidov TI - Nonnegative trigonometric polynomials with fixed mean passing through given points JO - Matematičeskie zametki PY - 1997 SP - 468 EP - 471 VL - 62 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1997_62_3_a14/ LA - ru ID - MZM_1997_62_3_a14 ER -