@techreport{lipski2008stt,
  title = {Spacetime Tetrahedra: Image-Based Viewpoint Navigation through Space and Time},
  author = {Lipski, Christian and Albuquerque, Georgia and Stich, Timo and Magnor, Marcus},
  institution = {Institut f{\"u}r Computergraphik, {TU} Braunschweig},
  number = {12-9},
  note = {http://www.digibib.tu-bs.de/?docid=00023968},
  month = {Dec},
  year = {2008}
}