Costa AFB, Magalhães MS de, Epprecht EK. Th e Non-Central Chi-Square Chart with Double Sampling. BJO&PM [Internet]. 2010 Feb. 8 [cited 2024 Apr. 27];2(2):21-38. Available from: https://bjopm.org.br/bjopm/article/view/BJV2N2_2005_P2