T. M. Shousha, N. A. Abo-Zaid, H. A. Hamada, M. Y. A. Abdelsamee, and M. A. Behiry, “The effect of smartphone use on neck flexion angle and hand grip power among adolescents: Cross-sectional study”, J. Hum. Sport Exerc., vol. 16, no. 3proc, pp. S883-S891, Sep. 2021.