@article{SchwabHennighausenAdleretal.2018,
  author    = {Frank Schwab and Christine Hennighausen and Dorothea C. Adler and Astrid Carolus},
  title     = {Television Is Still "Easy" and Print Is Still "Tough"? More Than 30 Years of Research on the Amount of Invested Mental Effort},
  journal   = {Frontiers in Psychology},
  volume    = {9},
  number    = {1098},
  doi       = {10.3389/fpsyg.2018.01098},
  year      = {2018},
}