1. “A study of math aptitude among boys and girls and its relationship with interest and vocational preferences at the secondary level”.- F.Khatoon, Ph.D Edu, Osmania University
2. “Some temperamental correlates of math learning”.-V.Deshmukh, Ph.D. Edu, Nagpur University.
3. “Students rating of teachers effectiveness,validity studies”-W.J.Mickeachie and Y.Lin.