Nałęcz, H., A. Ostrowska-Tryzno, i A. Pawlikowska-Piechotka. „Outdoor Gyms As an Example of Outdoor Recreation Activity in Urbanized Areas”. Turyzm/Tourism, t. 28, nr 1, czerwiec 2018, s. 65-71, doi:10.18778/0867-5856.28.1.16.