1. S. P. Martin, arXiv: hep-ph/9709356.
2. G. Bertone, D. Hooper, and J. Silk, Phys. Rep. 405, 279 (2005), arXiv: hep-ph/0404175.
3. M. Aaboud, et al. (ATLAS Collaboration), Eur. Phys. J. C 78, 625 (2018), arXiv: 1805.11381.
4. A. M. Sirunyan, et al. (CMS Collaboration), J. High Energ. Phys. 2018(5), 025 (2018), arXiv: 1802.02110.
5. J. D. Wells, in Proceedings of the 11th International Conference on Supersymmetry and the Unification of Fundamental Interactions (SUSY 2003): Implications of supersymmetry breaking with a little hierarchy between gauginos and scalars, Tucson, June 5–10, 2003. arXiv: hepph/0306127.