1.
Usman A, Tukur K, Suleiman A, Abdulkadir A, Ibrahim H. The use of the weighted least squares method when the error variance is heteroscedastic. BJS [Internet]. 2019 Jan. 1 [cited 2026 Aug. 6];2(1):85– 93. Available from: https://www.bjs-uniben.org/index.php/home/article/view/15