Tsitskari, E., & Batrakoulis, A. (2022). Investigar las estrategias de marketing del sector de la salud y el fitness en Grecia; la perspectiva de los gerentes (Investigating the marketing strategies of the health and fitness sector in Greece; the managers’ perspective). Retos, 43, 264–273. https://doi.org/10.47197/retos.v43i0.88880