@misc{Hoffmann1999,
author = {Hoffmann, Frank and Kriegel, Klaus and Schönherr, Sven and Wenk, Carola},
year = {1999},
title = {A simple and robust geometric algorithm for landmark registration in computer
assisted neurosurgery},
howpublished = "http://dx.doi.org/10.17169/refubium-21551",
}