Dehghan Nayeri, Nahid, Amir Hossein Goudarzian, Kaye Herth, Navaz Naghavi, Hamid Sharif Nia, Ameneh Yaghoobzadeh, Saeed Pahlevan Sharif, and Kelly-Ann Allen. 2020. “Construct Validity of the Herth Hope Index: A Systematic Review”. International Journal of Health Sciences 14 (5):50-57. https://ijhs.qu.edu.sa/index.php/journal/article/view/4735.