@article{ReiserZentgrafKindermannetal.2020,
  author    = {Mathias Reiser and Karen Zentgraf and Stefan Kindermann and Stefan K{\"u}nzell},
  title     = {An approach to quantify the float effect of float serves in indoor and beach volleyball},
  journal   = {Frontiers in sports and active living},
  volume    = {2},
  number    = {Article 559277},
  doi       = {10.3389/fspor.2020.559277},
  year      = {2020},
}