Effect of motor imagery training on tennis service performance in young tennis athletes - Fortes, Leonardo de Sousa; Almeida, Sebastião de Sousa; Nascimento Júnior, José Roberto Andrade; Fiorese, Lenamar; Lima Júnior, Dalton; Ferreira, Maria Elisa Caputo (Revista de Psicología del Deporte/Journal of Sport Psychology, 2019)