Astivia, Oscar L. Olvera and Zumbo, Bruno D.
"Heteroskedasticity in Multiple Regression Analysis: What it is, How to Detect it and How to Solve it with Applications in R and SPSS,"
Practical Assessment, Research, and Evaluation: Vol. 24
, Article 1.
Available at: https://scholarworks.umass.edu/pare/vol24/iss1/1