M. Yulianti, «Article RETRACTED due to manipulation by the authors Modelo de aprendizaje cooperativo tipo STAD y modelo de aprendizaje convencional: estudio comparativo de los resultados del aprendizaje de las técnicas básicas de pase inferior en voleibol (STAD-type cooperative learning model and conventional learning model: a comparative study on the learning outcomes of basic volleyball lower passing techniques): Article RETRACTED due to manipulation by the authors», Retos, vol. 55, pp. 346–352, jun. 2024.