F. F. Sufa, Gunarhadi, M. Akhyar, and Munawir, “Introduce Mathematical Concepts for Early Childhood: Inhibiting and Supporting Factors through Play in Children’s Cognitive Stimulation”, Psychosocial rehabilitation, vol. 24, no. 7, pp. 8650–8656, Sep. 2020, doi: 10.61841/kmb0an05.