Okondu, Ogechukwu, Emmanuel, Khadija Abubakar, Maitanmi Julius Olatade, Akingbade Oluwadamilare, Adesuyi Emmanuel O, Olugasa Babasola, Anyanwu Favour Chiamaka, și colab. „Behavioural risk-factors associated with the use of Facemask during Covid-19 pandemic lockdown period in Nigeria: online-based survey”. Student’s Journal of Health Research Africa 3, no. 12 (decembrie 30, 2022): 11. Data accesării octombrie 21, 2026. https://www.sjhrafrica.org.sjhresearchafrica.org/index.php/public-html/article/view/221.