@book { galindo2019, author = "Galindo, Edgar", title = "Training mathematical skills in school children: Some preliminary results.", publisher = "In Galindo, E. and Reschke, K. (Eds.) Psychology in Education and Health IV. Proceedings of the IV Leipzig-Evora Scientific Meeting in Psychology (pp. 152-161). [E-book version]. ISBN: 978-989-8805-58-4", year = "2019" }