Dulio Oseda Gago , Ruth Katherine Mendivel Gerónimo, Jesús Mery Arias Huánuco, Angélica Sánchez Castro. “Cooperative Learning and Notions of Geometry in 5-Year-Old Children in Educational Preschool Institutions”. Turkish Journal of Computer and Mathematics Education (TURCOMAT), vol. 12, no. 14, Sept. 2021, pp. 3683-90, doi:10.17762/turcomat.v12i14.10998.