TY - JOUR AU - Quigley. F. TI - Approximation by Algebras of Functions. JO - Mathematische Annalen PY - 1958 SP - 81 EP - 92 VL - 135 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MAN_1958__135_160604/ ID - MAN_1958__135_160604 ER -