Hayfa Abdul Jawad Saieed, Delshad Shaker Ismail Botani و Adnan Mustafa Hussein AL-Sinjary (2023) "Construction of a Control Chart Using SSM for Multivariate t Distribution Data", Tikrit Journal of Pure Science, 22(3), ص 156–165. doi: 10.25130/tjps.v22i3.725.