The following publications are possibly variants of this publication:
- On efficient use of auxiliary information for control charting in SPCShabbir Ahmad, Saddam Akber Abbasi, Muhammad Riaz, Nasir Abbas. candie, 67:173-184, 2014. [doi]
- A new auxiliary information based cumulative sum median control chart for location monitoringShahid Hussain, Li-xin Song, Shabbir Ahmad, Muhammad Riaz. jzusc, 20(4):554-570, 2019. [doi]