Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Hans-Peter Meinzer, Kirsten Meetz, Dinu Scheppelmann, Uwe Engelmann, Hans Jürgen Baur. The Heidelberg ray tracing model. IEEE Computer Graphics and Applications, 11(6):34-43, 1991. [doi]