A. Grigoryan

Multivariate double sampling |S| charts for controlling process variability

A. Grigoryan, D. He *, David He, 2005 .

Multivariate multiple sampling charts

D. He, A. Grigoryan, 2005 .

An improved double sampling s chart

David He, Arsen Grigoryan, A. Grigoryan, 2003 .

Joint statistical design of double sampling X and s charts

David He, Arsen Grigoryan, D. He, 2006, Eur. J. Oper. Res..