余桑. A NEW UNIFIED FIELD THEORY OF GRAVITATION AND ELECTROMAGNETISM BASED ON THE PRINCIPLE OF IDENTlFICATION[J]. 数学物理学报(英文版), 1983, 3(4): 423-437.
Yu Xin. A NEW UNIFIED FIELD THEORY OF GRAVITATION AND ELECTROMAGNETISM BASED ON THE PRINCIPLE OF IDENTlFICATION[J]. Acta mathematica scientia,Series B, 1983, 3(4): 423-437.