Rasha Mohamed Elgammal. "The impact of learning environment based on virtual worlds to overcome the psychological feeling of loneliness affecting the learning processes of the university education students", المجلة العلمية للجمعية المصرية للکمبيوتر التعليمي, 1, 1, 2012, 165-177. doi: 10.21608/eaec.2012.52863