The Concept of Marketing Activity of the Organizations in the Sphere of Services of Physical Education and Sports. Laisvalaikio tyrimai, [S. l.], v. 2, n. 2, 2013. DOI: 10.33607/elt.v2i2.201. Disponível em: https://journals.lsu.lt/laisvalaikio-tyrimai/article/view/201. Acesso em: 8 may. 2025.