- 
								[1]
								R. Dickson et al. [CLAS Collaboration], Phys. Rev. C, 93: 065202 (2016) 
- 
								[2]
								A. A. Osipov, A. A. Pivovarov, and M. K. Volkov, Phys. Rev. D, 96: 054012 (2017) 
- 
								[3]
								E. Oset et al., Int. J. Mod. Phys. E, 25: 1630001 (2016) 
- 
								[4]
								L. S. Geng and E. Oset, Phys. Rev. D, 94: 014018 (2016) 
- 
								[5]
								J. M. Dias, V. R. Debastiani, J. J. Xie et al., Chin. Phys. C, 42: 043106 (2018) 
- 
								[6]
								Y. Kalashnikova, A. E. Kudryavtsev, A. V. Nefediev et al., Phys. Rev. C, 73: 045203 (2006) 
- 
								[7]
								M. Tanabashi et al., Phys. Rev. D, 98: 030001 (2018) 
- 
								[8]
								L. Roca, E. Oset, and J. Singh, Phys. Rev. D, 72: 014002 (2005) 
- 
								[9]
								Y. Zhou, X. L. Ren, H. X. Chen et al., Phys. Rev. D, 90: 014020 (2014) 
- 
								[10]
								L. S. Geng, X. L. Ren, Y. Zhou et al., Phys. Rev. D, 92: 014029 (2015) 
- 
								[11]
								F. Aceti, J. M. Dias and E. Oset, Eur. Phys. J. A, 51: 48 (2015) 
- 
								[12]
								M. Ablikim et al. [BESIII Collaboration], Phys. Rev. D, 92: 012007 (2015) 
- 
								[13]
								F. Aceti, J. J. Xie, and E. Oset, Phys. Lett. B, 750: 609 (2015) 
- 
								[14]
								S. Ishida, K. Yamada, and M. Oda, Phys. Rev. D, 40: 1497 (1989) 
- 
								[15]
								V. R. Debastiani, F. Aceti, W. H. Liang et al., Phys. Rev. D, 95: 034015 (2017) 
- 
								[16]
								W. H. Liang and E. Oset, Eur. Phys. J. C, 80: 407 (2020) 
- 
								[17]
								L. Roca, A. Hosaka, and E. Oset, Phys. Lett. B, 658: 17 (2007) 
- 
								[18]
								M. Bando, T. Kugo, S. Uehara et al., Phys. Rev. Lett., 54: 1215 (1985) 
- 
								[19]
								M. Bando, T. Kugo, and K. Yamawaki, Phys. Rept., 164: 217 (1988) 
- 
								[20]
								M. Harada and K. Yamawaki, Phys. Rept., 381: 1 (2003) 
- 
								[21]
								U. G. Meissner, Phys. Rept., 161: 213 (1988) 
- 
								[22]
								Y. Oh and H. Kim, Phys. Rev. C, 73: 065202 (2006) 
- 
								[23]
								S. H. Kim, S. i. Nam, Y. Oh et al., Phys. Rev. D, 84: 114023 (2011) 
- 
								[24]
								S. H. Kim, S. i. Nam, A. Hosaka et al., Phys. Rev. D, 88: 054012 (2013) 
- 
								[25]
								A. C. Wang, W. L. Wang, F. Huang et al., Phys. Rev. C, 96: 035206 (2017) 
- 
								[26]
								F. E. Close, Academic Press/london 1979, 481p 
- 
								[27]
								X. H. Liu and Q. Zhao, Phys. Rev. D, 81: 014017 (2010) 
- 
								[28]
								G. Li, X. h. Liu, Q. Wang et al., Phys. Rev. D, 88: 014010 (2013) 
- 
								[29]
								W. Qin, C. An, G. Li, C. Wang et al., Eur. Phys. J. C, 79: 757 (2019) 
- 
								[30]
								Y. Zhang and G. Li, Phys. Rev. D, 97: 014018 (2018) 
- 
								[31]
								X. H. Liu, G. Li, J. J. Xie et al., Phys. Rev. D, 100: 054006 (2019) 
- 
								[32]
								Q. Wu, G. Li, F. Shao et al., Phys. Rev. D, 94: 014015 (2016) 
- 
								[33]
								H. Nagahiro, L. Roca, and E. Oset, Eur. Phys. J. A, 36: 73 (2008) 
- 
								[34]
								H. Nagahiro, L. Roca, A. Hosaka et al., Phys. Rev. D, 79: 014015 (2009) 
- 
								[35]
								R. Molina, H. Nagahiro, A. Hosaka et al., Phys. Rev. D, 83: 094030 (2011) 
- 
								[36]
								H. C. Chiang, E. Oset, and L. C. Liu, Phys. Rev. C, 44: 738 (1991) 
- 
								[37]
								L. S. Geng and E. Oset, Phys. Rev. D, 79: 074009 (2009) 
- 
								[38]
								C. Hanhart, Y. S. Kalashnikova, and A. V. Nefediev, Phys. Rev. D, 81: 094028 (2010) 
- 
								[39]
								J. J. Xie and E. Oset, Eur. Phys. J. A, 51: 111 (2015) 
- 
								[40]
								J. J. Xie and G. Li, Eur. Phys. J. C, 78: 861 (2018) 
- 
								[41]
								X. Zhang and J. J. Xie, Commun. Theor. Phys., 70: 060 (2018) 
- 
								[42]
								X. Zhang and J. J. Xie, Chin. Phys. C, 43: 064104 (2019)