H. M. B. Erreyes, J. A. V. Jiménez, J. C. B. Erreyes, J. F. A. Flores, and T. M. B. García, “THE INTER-LEARNING OF GEOMETRY IN MIDDLE ELEMENTARY EDUCATION STUDENTS IN ECUADOR”, Int. J. Res. Granthaalayah, vol. 6, no. 4, pp. 211–220, Apr. 2018.