Cha, J.H. and Finkelstein, M. (2016). New shock models based on the generalized Polya process. European Journal of Operational Research, 251(1), 135–141.
Eryilmaz, S. (2012). Generalized $\delta$-shock model via runs. Statistics and Probability Letters, 82(2), 326–331.
Eryilmaz, S. (2017). $\delta$-shock model based on Polya process and its optimal replacement policy. European Journal of Operational Research, 263(2), 690–697.
Li, Z.H., Chan, L.Y. and Yuan, Z.X. (1999a). Failure time distribution under a $\delta$-shock model and its application to economic design of system. International Journal of Reliability, Quality and Safety Engineering, 6(3), 237–247.
Li, Z.H., Huang, B.S. and Wang, G.J. (1999b). Life distribution and its properties of shock models under random shocks. Journal of Lanzhou University, 35(4), 1–7.
Li, Z.H. and Kong, X.B. (2007). Life behavior of $\delta$-shock model. Statistics and Probability Letters, 77(6), 577–587.
Li, Z.H. and Zhao, P. (2007). Reliability analysis on the $\delta$-shock model of complex systems. IEEE Transactions on Reliability, 56(2), 340–348.
Lorvand, H., Nematollahi, A. and Poursaeed, M.H. (2019). Life distribution properties of a new $\delta$-shock model. Communications in Statistics: Theory and Methods. https://doi.org/10.1080/03610926.2019.1584316.
Tuncel, A. and Eryilmaz, S. (2018). System reliability under $\delta$-shock model. Communications in Statistics: Theory and Methods, 47(19), 4872–4880.
Wang, G.J. and Zhang, Y.L. (2007). A shock model with two-type failures and optimal replacement policy. International Journal of Systems Science, 36(4), 209–214.
Wang, G.J. and Peng, R. (2016). A generalized $\delta$-shock model with two types of shocks. International Journal of System Science: Operations and Logistics, 4(4), 372–383.