Ayinde, K., A. F. Lukman, and O. Arowolo. “Combined Parameters Estimation Methods of Linear Regression Model With Multicollinearity and Autocorrelation”. Journal of Asian Scientific Research, vol. 5, no. 5, May 2015, pp. 243-50, doi:10.18488/journal.2/2015.5.5/2.5.243.250.