Kopczyński, Kazimierz. “Ecotherapy As a Form of Supporting and Stimulation to Activity of the Seniors”. Old Age in the Stream of Life: Reflections on Old Age. Volume 2, edited by Elżbieta Dubas and Marcin Muszyński, Lodz University Press, 2019, pp. 147-59, https://doi.org/10.18778/8142-303-8.10.