Arimbi, A., Patmawati, P., Silatulrahmi, S., & Nurliani, N. (2018). Fartlek Training on the Improvement of Hemoglobin Conditions and Hematocrit. International Journal of Sciences: Basic and Applied Research (IJSBAR), 38(2), 42–46. Retrieved from https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/8836