- 
								[1]
								Y. L. Wu, Phys. Rev. D, 93:024012(2016) 
- 
								[2]
								A. Einstein, Sitz. Preuss. Akad. Wiss., 25:844(1915); A. Einstein, Annalen der Physik, 49:769(1916) 
- 
								[3]
								A. Einstein, Naherungsweise integration der feldgleichungen der gravitation, Sitz. Preuss. Akad. Wiss., Part 1, 688(1916) 
- 
								[4]
								B. P. Abbott et al (LIGO Scientific Collaboration and Virgo Collaboration), Phys. Rev. Lett., 116:6(2016) 
- 
								[5]
								G. Aad et al (ATLAS Collaboration), Phys. Lett. B, 716:1(2012) 
- 
								[6]
								S. Chatrchyan et al (CMS Collaboration), Phys. Lett. B, 716:30(2012) 
- 
								[7]
								S. Tomonaga, Prog. of Theor. Phys., 1:27(1946) 
- 
								[8]
								J. Schwinger, Phys. Rev., 73:416(1948); Phys. Rev., 74:1439(1948) 
- 
								[9]
								R. P. Feynman, Phys. Rev., 76:769(1949); Phys. Rev., 76:749(1949); Phys. Rev., 80:440(1950) 
- 
								[10]
								F. Dyson, Phys. Rev., 75:486(1949); Physical Review, 75:1736(1949) 
- 
								[11]
								S. L. Glashow, Nucl. Phys., 22:579(1961) 
- 
								[12]
								S. Weinberg, Phys. Rev. Lett., 19:1264(1967) 
- 
								[13]
								A. Salam, in Proceedings of the Eight Nobel Symposium, on Elementary Particle Theory, Relativistic Groups, and Analyticit, Stochholm, Sweden, 1968:edited by N. Svartholm (Almqvist and Wikell, Stockholm, 1968) 
- 
								[14]
								D. J. Gross and F. Wilczek, Phys. Rev. Lett., 30:1343(1973) 
- 
								[15]
								H. D. Politzer, Phys. Rev. Lett., 30:1346(1973) 
- 
								[16]
								P. A. Dirac, Proceedings of the Royal Society A:Mathematical, Physical and Engineering Sciences, 117(778):610(1928) 
- 
								[17]
								H. Weyl, Sitz. Konigl. Preuss. Akad Wiss. (Berlin), 26:465(1918)