WASET
Haghjoo, S. , Reyhani, E. , Kolahdouz, F.. "Evaluating the Understanding of the University Students (Basic Sciences and Engineering) about the Numerical Representation of the Average Rate of Change". World Academy of Science, Engineering and Technology, Open Science Index 158, International Journal of Educational and Pedagogical Sciences, (2020), 14(2), 111 - 121.