BADARISAM, F. N., and M. S. . Mohamad Anuar. “Parameter Estimation for Circular Simultaneous Functional Relationship Model (CSFRM) for Unequal Variances”. Journal of Statistical Modeling &Amp; Analytics (JOSMA), vol. 5, no. 2, Oct. 2023, doi:10.22452/josma.vol5no2.5.