Widiyanto, Widiyanto, Hendra Setyawan, Suharjana Suharjana, Sugeng Purwanto, Eka Novita Indra, Sandi Prayudho, José Vicente García-Jiménez, et al. 2024. “Article RETRACTED Due to Manipulation by the Authors Los Diferentes Resultados En Lsa Habilidades De Servicio De Los Tenistas jóvenes Evaluadas Según El género Y La Edad (The Differences Result in Serve Skill of Junior Tennis Players Assessed Based on Gender and Age): Article RETRACTED Due to Manipulation by the Authors”. Retos 54 (May): 272-78. https://doi.org/10.47197/retos.v54.102757.