PANICHKITKOSOLKUL, W. An Improved Confidence Interval for The Difference between Standard Deviations of Normal Distributions Using a Ranked Set Sampling. Journal of Science and Technology, [S. l.], v. 12, n. 1, p. 29–40, 2020. Disponível em: https://publisher.uthm.edu.my/ojs/index.php/JST/article/view/6106. Acesso em: 29 jun. 2022.