Sarah Abbas Abdul-Zahra, and Abdul Hussein Saber ALMouel. “Restricted Maximum Likelihood Estimators for Unbalanced of Oneway Repeated Measurements Model”. Eurasian Journal of Physics,Chemistry and Mathematics, vol. 16, Mar. 2023, pp. 98-105, https://geniusjournals.org/index.php/ejpcm/article/view/3790.