M. M. Raptopoulos and A. M. Simaens, "Enhancing social impacts of third sector organizations amid the Covid-19 pandemic", in Proc. of the 16th European Conf. on Innovation and Entrepreneurship (ECIE 2021) , Matos, F., Ferreiro, M. de F., Rosa, A., and Salavisa, I., Ed., Virtual, Online, Academic Conferences and Publishing International Limited, 2021, vol. 2, pp. 1196-1204