da Silva, Ana Lúcia, Enyleide Noqueira, Wiliams Campos, Jorge Júnior, and Miguel De Albuquerque. 2019. “USING CONTROL CHARTS FOR VARIABLES ( ”. ITEGAM-JETIA 5 (18), 105-12. http://br940.teste.website/~itegamjetia/journal/index.php/jetia/article/view/419.