TY - JOUR AU - Tariq Shah AU - Ehsan Ullah TI - Factorization properties of subrings in trigonometric polynomial rings JO - Publications de l'Institut Mathématique PY - 2009 SP - 123 VL - _N_S_86 IS - 100 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.2298/PIM0900123S/ DO - 10.2298/PIM0900123S LA - en ID - 10_2298_PIM0900123S ER -