@article{GruenewaldMeinel2015,
  author    = {Franka Gr{\"u}newald and Christoph Meinel},
  title     = {Implementation and Evaluation of Digital E-Lecture Annotation in Learning Groups to Foster Active Learning},
  journal   = {IEEE transactions on learning technologies},
  volume    = {8},
  number    = {3},
  pages     = {286 -- 298},
  doi       = {10.1109/TLT.2015.2396042},
  year      = {2015},
}