中国科学院数学与系统科学研究院期刊网
Inverse Theorem to the Best Approximation by Polynomials in Bergman Spaces B_q~p(p>0, q>1)
Fu Chong XING
Acta Mathematica Sinica, Chinese Series . 2006, (3): 519 -524 .  DOI: 10.12386/A2006sxxb0065