@inproceedings{ls_leimeister,
  address = {Helsinki, Finland},
  author = {Bullinger, A. C. and Hoffmann, H. and Leimeister, J. M.},
  booktitle = {European Conference of Information Systems 2011},
  interhash = {45c5351c27811f4a29ca2a9cb8874b26},
  intrahash = {1b89c1d796fd308f37baaf27970dd71c},
  note = {239 (24-11)},
  title = {The next step – open prototyping},
  url = {http://www.uni-kassel.de/fb7/ibwl/leimeister/pub/JML_239.pdf},
  year = 2011
}

@inproceedings{ls_leimeister,
  address = {Helsinki, Finland},
  author = {Bullinger, A. C. and Hoffmann, H. and Leimeister, J. M.},
  booktitle = {European Conference of Information Systems 2011},
  interhash = {45c5351c27811f4a29ca2a9cb8874b26},
  intrahash = {1b89c1d796fd308f37baaf27970dd71c},
  note = {239 (24-11)},
  title = {The next step – open prototyping},
  url = {http://pubs.wi-kassel.de/wp-content/uploads/2013/03/JML_296.pdf},
  year = 2011
}