Najafi Doulatabad, S., A. Najafi Doulatabad, S. Sadat, and Z. Mohebbi Nobandegani. “The Study of Effective Factors on Some of the Biologic Rhythms from the View Point of Hospitalized Patients”. International Journal of Occupational Safety and Health, vol. 1, no. 1, Aug. 2011, pp. 14-16, doi:10.3126/ijosh.v1i1.4379.