1. R. Aaij et al., Phys. Rev. Lett. 118, 182001 (2017),
arXiv:1703.04639
2. R. Aaij et al., Phys. Rev. Lett. 119, 112001 (2017),
arXiv:1707.01621
3. A.V. Sarantsev et al., Phys. Lett. B 659, 94–100 (2008),
arXiv:0707.3591
4. I.G. Aznauryan et al., Phys. Rev. C 80, 055203 (2009),
arXiv:0909.2349
5. I.G. Aznauryan et al., Int. J. Mod. Phys. E 22, 1330015 (2013),
arXiv:1212.4891