1.
Barner D, Athanasopoulou A, Chu J, Lewis M, Marchand E, Schneider R, Frank M. A One-Year Classroom-Randomized Trial of Mental Abacus Instruction for First- and Second-Grade Students. JNC [Internet]. 2018Jan.30 [cited 2024Apr.25];3(3):540-58. Available from: https://jnc.psychopen.eu/index.php/jnc/article/view/5761