Maksim-Dąbrowska, Klaudia. “The SuperGradma and SuperGradpa School As an Innovative Form of Activating Seniors ”. Exlibris Social Gerontology Journal, vol. 14, no. 2, Dec. 2017, pp. 97-105, https://doi.org/10.24917/10.24917/24500232.142.8.