@Inproceedings{kipp2012introducing,
  author = {Kipp, P. and Zogaj, S. and Ebel, P. and Bretschneider, U. and Leimeister, J. M.},
  title  = {Introducing Open Innovation to Universities - How to Increase Universities Innovativeness},

  year   = {2012},
  number = {},
  url    = {http://pubs.wi-kassel.de/wp-content/uploads/2013/03/JML_349.pdf},

  const  = {\ text}
}
@Inproceedings{ls_leimeister,
  author = {Zogaj, S. and Kipp, P. and Ebel, P. and Bretschneider, U. and Leimeister, J. M.},
  title  = {Towards Open Innovation In Universities: Fostering the Inside-Out-Process Using Ideas Competitions},

  year   = {2012},
  number = {},
  url    = {http://pubs.wi-kassel.de/wp-content/uploads/2013/03/JML_317.pdf},

  const  = {\ text}
}