Brabec, Stefan Computer Graphics, MPI for Informatics, Max Planck Society;
Seidel, Hans-Peter Computer Graphics, MPI for Informatics, Max Planck Society;
Brabec, S., & Seidel, H.-P. (2002). Single Sample Soft Shadows Using Depth Maps. In Graphics Interface 2002 (pp. 219-228). Natick, USA: A K Peters.