| [1] J. M. Díaz, S. Dormido * and J. Aranda (2005), doi:10.1080/00313020500171657 |
| [2] Andreja Rojko, Matja Debevc and Darko Hercog (2009), doi:10.2478/v10051-008-0025-3 |
| [3] S.Dormido Bencomo (2004), doi:10.1016/j.arcontrol.2003.12.002 |
| [4] J.J. Govindhasamy, S.F. McLoone and G.W. Irwin (2005), doi:10.1109/MLSP.2005.1532911 |
| [5] Stig Moberg and Sven Hanssen (2008), doi:10.3182/20080706-5-KR-1001.02069 |
| [6] Stig Moberg, Jonas Öhr and Svante Gunnarsson (2008), doi:10.3182/20080706-5-KR-1001.00208 |
| [7] S. Dormido Bencomo (2002), doi:10.3182/20020721-6-ES-1901.01641 |
| [8] S. Dormido Bencomo (2003), doi:10.1016/S1474-6670(17)33646-7 |
| [9] J.M.F. Calado, P.M.A. Silva, J.M.G. Sá da Costa and V.M. Becerra (2003), doi:10.1016/S1474-6670(17)33658-3 |
| [10] Jun Zhang and Qingxue Huang (2018), doi:10.1155/2018/3707359 |
| [11] Eriksson Lars (2019), doi:10.1007/s11768-019-8268-5 |
| [12] Rolf Isermann (2011), doi:10.1016/j.conengprac.2011.08.004 |