UZUN, Nurettin Ersin, et al. “Valuation of the Reliability of the Formulas of the Yo-Yo Intermittent Recovery Test (Level 1) and 30-15 IFT, Which Are Intermittent Endurance Tests Used to Determine Maximum Oxygen Capacity”. Sportif Bakış: Spor Ve Eğitim Bilimleri Dergisi, vol. 8, no. 2, Aug. 2021, pp. 268-80, doi:10.33468/sbsebd.221.