- 
								[1]
								F. A. Berends et al, Nucl. Phys. B, 57:381(1973) 
- 
								[2]
								F. A. Berends et al, Nucl. Phys. B, 63:381(1973) 
- 
								[3]
								F. A. Berends et al, Nucl. Phys. B, 68:541(1974) 
- 
								[4]
								F. A. Berends et al, Nucl. Phys. B, 115:114(1976) 
- 
								[5]
								M. E. Peskin et al, An Introduction to Quantum Field Theory, (New York, 1995) 
- 
								[6]
								J. D. Jackson et al, Nucl. Inst. and Method, 128:13(1975) 
- 
								[7]
								A. Osterheld et al, SLAC-PUB-4160(1986)(T/E) 
- 
								[8]
								C. Edward et al, SLAC-PUB-5160(1990)(T/E) 
- 
								[9]
								Y. S. Tsai, SLAC-PUB-3129, May 1983(T/E) 
- 
								[10]
								A. G. Shamov (KEDR Collaboration), CPC (HEP&NP), 34: 836(2010) 
- 
								[11]
								T. Barnes et al, Phys. Rev. D, 72:054026(2005) 
- 
								[12]
								V. V. Anashin et al, Phys. Lett. B, 685:134(2010) 
- 
								[13]
								V. V. Anashin et al, arXiv: 1109.4215 [hep-ex] 
- 
								[14]
								M. Ablikim et al, Phys. Lett. B, 660:315(2008) 
- 
								[15]
								M. Ablikim et al, Phys. Lett. B, 677:239(2009) 
- 
								[16]
								H. HU et al, Chinese Physics C (HEP & NP), 25: 701(2001) 
- 
								[17]
								L. Köpke and N. Wermes, Phys. Reprt., 174:47(1989) 
- 
								[18]
								Particle Data Group, Chinese Physics C, 38: 511(2014) 
- 
								[19]
								R. Barbieri et al, Phys. Lett. B, 106:497(1981) 
- 
								[20]
								R. Van Royen et al, Nuovo Cim., 50: 617(1967); 51: 583(1967) 
- 
								[21]
								W. Greiner et al, Quantum Electrodynamics, (Berlin: Springer, 2002) P. 292 
- 
								[22]
								N. Cabibbo et al, Phys. Rev., 124:1577(1961) 
- 
								[23]
								E. Cremmer et al, Nucl. Phys. B, 12:383(1969) 
- 
								[24]
								V. V. Anashin et al, arXiv: 1610.02827 [hep-ex] 
- 
								[25]
								V. V. Anashin et al, arXiv: 1510.02667 [hep-ex] 
- 
								[26]
								Eichten et al, Phys. Rev. D, 21:21(1980) 
- 
								[27]
								W. Lucha et al, Phys. Rep., 4:127(1991)