Ari Iswanto, Rezha Arzhan Hidayat, Fathan Nurcahyo, Hary Widodo, and Muhammad Wahyu Arga, “CGFU-PM 515 based physical education learning model to improve forward roll skills in elementary school students in Sleman Regency”, j. olahraga prestasi, vol. 21, no. 2, pp. 31–37, Sep. 2025.