AREEPONG, Yupaporn. The Detection of Shifts in the Ratio of Two Poisson Means with an Exponentially Weighted Moving Average Control Chart. Naresuan University Journal: Science and Technology (NUJST), [S.l.], v. 26, n. 2, p. 110-118, june 2018. ISSN 2539-553X. Available at: <http://www.journal.nu.ac.th/NUJST/article/view/1918>. Date accessed: 31 mar. 2020.