@article{KellisEllinoudisIntziegiannietal.2020,
  author    = {Eleftherios Kellis and Athanasios Ellinoudis and Konstantina Intziegianni and Nikolaos Kofotolis},
  title     = {Muscle thickness during core stability exercises in children and adults},
  journal   = {Journal of human kinetics},
  volume    = {71},
  number    = {1},
  pages     = {131 -- 144},
  doi       = {10.2478/hukin-2019-0079},
  year      = {2020},
}