Sperlich, B., Zinner, C., Heilemann, I., Kjendlie, P., Holmberg, H., & Mester, J. (2010). High-intensity interval training improves VO(2peak), maximal lactate accumulation, time trial and competition performance in 9–11-year-old swimmers. Springer-Verlag.

Sperlich, Billy, Christoph Zinner, Ilka Heilemann, Per-Ludvik Kjendlie, Hans-Christer Holmberg, và Joachim Mester. High-intensity Interval Training Improves VO(2peak), Maximal Lactate Accumulation, Time Trial and Competition Performance in 9–11-year-old Swimmers. Springer-Verlag, 2010.

Sperlich, Billy, et al. High-intensity Interval Training Improves VO(2peak), Maximal Lactate Accumulation, Time Trial and Competition Performance in 9–11-year-old Swimmers. Springer-Verlag, 2010.