@TechReport{schneider03ikp,
  author =   {G. Schneider},
  title =    {Invariance Kernels of Polygonal Differential Inclusions},
  institution =  {Department of IT, Uppsala University},
  year =     {2003},
  OPTkey =   {},
  OPTtype =      {},
  number =   {2003-042},
  OPTaddress =   {},
  month =    {},
  OPTnote =      {},
  OPTannote =    {}
}