Projective model for central catadioptric cameras using Clifford algebra
 @InProceedings{tolvanen05dagm,
  author = 	 {A. Tolvanen and C. Perwass and G. Sommer},
  title = 	 {Projective model for central catadioptric cameras using Clifford algebra},
  booktitle =	 {27. Symposium f{\"u}r Mustererkennung, DAGM 2005, Wien, 29.8.-2.9.005},
  year =	 2005,
  series =	 {LNCS},
  volume =     {3663},
  organization = {Springer-Verlag, Berlin, Heidelberg},
  pages = {192-199}
}