中国科学院数学与系统科学研究院期刊网
ON COMPLETENESS AND ORTHOGONALITY OF GENERALIZED SPHERICAL FUNCTIONS IN A HOMOGENOUS SPACE
孫本旺
Acta Mathematica Sinica, Chinese Series . 1956, (3): 405 -417 .  DOI: 10.12386/A1956sxxb0031