1. H.-H. Adam et al., arXiv:nucl-ex/0411038 (2004)
2. H.H. Adam et al. [COSY-11 Collaboration], Phys. Rev. C 75, 014004 (2007)
3. P. Adlarson et al. [WASA-at-COSY Collaboration], Phys. Rev. C 88, 055208 (2013)
4. P. Adlarson et al. [WASA-at-COSY Collaboration], Eur. Phys. J. A 50, 100 (2014)
5. P. Adlarson et al. [WASA-at-COSY Collaboration], Nucl. Phys. A 959, 102 (2017)