@Inproceedings{ls_leimeister,
  author = {Sunyaev, A. and Leimeister, J. M. and Krcmar, H.},
  title  = {Open security issues in German healthcare telematics},

  year   = {2010},
  number = {},
  url    = {http://www.uni-kassel.de/fb7/ibwl/leimeister/pub/JML_155.pdf},

  const  = {\ text}
}
@Inproceedings{ls_leimeister,
  author = {Sunyaev, A. and Leimeister, J. M. and Krcmar, H.},
  title  = {Open security issues in German healthcare telematics},

  year   = {2010},
  number = {},
  url    = {http://pubs.wi-kassel.de/wp-content/uploads/2013/03/JML_190.pdf},

  const  = {\ text}
}