@article{KunzAzadEngelHolmbergetal.2019,
  author    = {Philipp Kunz and Florian Azad Engel and Hans-Christer Holmberg and Billy Sperlich},
  title     = {A meta-comparison of the effects of high-intensity interval training to those of small-sided games and other training protocols on parameters related to the physiology and performance of youth soccer players},
  journal   = {Sports Medicine - Open},
  volume    = {5},
  doi       = {10.1186/s40798-019-0180-5},
  year      = {2019},
}