Zubiaur González M, del Riego Casado M. Motivaciones e intereses de practicantes de BMX adolescentes: un estudio piloto (Motivations and interests of practicing teenagers of BMX: a pilot study). Retos [Internet]. 2015 Jan. 1 [cited 2025 Oct. 31];27:109-13. Available from: http://www.revistaretos.org/index.php/retos/article/view/34358