YusufFeby Indriana, and Gatut Rubiono. 2018. “Analisis Matematis Prediksi Jarak Lompatan Atlet Lompat Jauh Berbasis Sudut Tolakan (Take-Off)”. Prosiding Seminar Nasional IPTEK Olahraga (SENALOG) 1 (1), IKOR 40-44. https://ejournal.unibabwi.ac.id/index.php/semnassenalog/article/view/187.