Saludable mente, 2021: title page (Marcos Vázquez, author) inside front cover (Marcos Vázquez, creator of the blog Fitness Revolucionario and the podcast Radio Fitness Revolucionario)

Fuera de Serie, article posted July 20, 2021, accessed via WWW, October 8, 2021 (Marcos Vázquez, creator of Fitness Revolucionario, author; born in October 1976 in Avilés, Asturias, [Spain])

Fitnessrevolucionario.com, privacy statement page, accesed via WWW, October 8, 2021 (Responsible party, Marcos Vázquez García; lists location as Gijón, Spain)