@article{Reit2015,
  author    = {Xenia-Rosemarie Reit},
  title     = {Thought structures of modelling task solutions and their connection to the level of difficulty},
  journal   = {Procedia - Social and Behavioral Sciences},
  volume    = {191},
  pages     = {2661 -- 2666},
  doi       = {10.1016/j.sbspro.2015.04.515},
  year      = {2015},
}