Tariq, S. ., Noor-ul-Amin, M. ., Hanif, M. . and Jun, C.-H. . (2020) “Improved Hybrid Exponentially Weighted Moving Average Control Chart using Auxiliary Information”, Journal of Reliability and Statistical Studies, 13(01), pp. 113–126. doi: 10.13052/jrss0974-8024.1316.