Meulenkamp, Victor, Barbara Huijgen, and Matthias Kempe. “Influence of Relative Pitch Area (RPA) on the Physical Demands Across Late-Stage Age Categories in Elite Academy Soccer”. Current Issues in Sport Science (CISS) 11, no. 2 (February 4, 2026): 033. Accessed February 5, 2026. https://ciss-journal.org/article/view/13343.