1. Moreau, J.J.: On unilateral constraints, friction and plasticity. In: Capriz, G., Stampacchia, G. (eds.): Proceedings of C.I.M.E. Summer Schools on new variational techniques in mathematical physics, pp. 173–322. Cremonese, Rome (1974)
2. Colombo, G., Thibault, L.: Prox-Regular Sets and Applications. In: Gao, D.Y., Motreanu, D. (eds.) Handbook of Nonconvex Analysis, pp. 99–182. International Press, Boston (2010)
3. Adly, S.: A coderivative approach to the robust stability of composite parametric variational systems. Applications in nonsmooth mechanics. Optim. Theory Appl. 180, 62–90 (2019)
4. Brogliato, B.: Nonsmooth Mechanics: Models, Dynamics and Control, 3rd edn. Springer, Cham (2016)
5. Hedjar, R., Bounkhel, M.: Real-time obstacle avoidance for a swarm of autonomous mobile robots. Int. J. Adv. Robot. Syst. 11, 1–12 (2014)