Gazissou Balama, Dayang Paul, Kaladzavi Guidedi, Mfenjou Martin Luther, and Kolyang. “State Of Art on Ontologies for Improving the Living Conditions of Seniors: Positioning Towards Learning Systems For Seniors”. International Journal of Progressive Research in Science and Engineering, vol. 2, no. 6, June 2021, pp. 129-37, https://journal.ijprse.com/index.php/ijprse/article/view/311.