El-Gilany, Abdel-Hady, Nadia Saleh, Heba Mohamed, and Eman Elsayed. 2017. “Prevalence of Insomnia and Its Associated Factors Among Rural Elderly: A Community Based Study”. International Journal of Advanced Nursing Studies 6 (1): 56-62. https://doi.org/10.14419/ijans.v6i1.7415.