Leal Filho, Walter; Brandli, Luciana Londero; Lange Salvia, Amanda; Rayman-Bacchus, Lez; Platje, Johannes (2020-07-01). "COVID-19 and the UN Sustainable Development Goals: Threat to Solidarity or an Opportunity?" (en). Sustainability12 (13): 5343. doi:10.3390/su12135343. ISSN2071-1050.
Leal Filho, Walter; Brandli, Luciana Londero; Lange Salvia, Amanda; Rayman-Bacchus, Lez; Platje, Johannes (2020-07-01). "COVID-19 and the UN Sustainable Development Goals: Threat to Solidarity or an Opportunity?" (en). Sustainability12 (13): 5343. doi:10.3390/su12135343. ISSN2071-1050.