中国科学院数学与系统科学研究院期刊网
ON THE GIBBS PHENOMENON FOR RIEMANN SUMMATION(R,k)OF GENERALIZED FOURIER SERIES
李经熙
Acta Mathematica Sinica, Chinese Series . 1959, (1): 28 -36 .  DOI: 10.12386/A1959sxxb0005