A Laboratory for a Digital Design Course Using FPGAs. - Stephan W. Gehring; Stefan H.-M. Ludwig; Niklaus Wirth (FPL, 1994)

The Trianus System and Its Application to Custom Computing. - Stephan W. Gehring; Stefan H.-M. Ludwig (FPL, 1996)

The Design of a Coprocessor Board Using Xilinx's XC6200 FPGA - An Experience Report. - Stefan H.-M. Ludwig (FPL, 1996)

FPGA synthesis on the XC6200 using IRIS and Trianus/Hades (or from heaven to hell and back again). - Roger F. Woods; Stefan H.-M. Ludwig; Jean-Paul Heron; David W. Trainor; Stephan W. Gehring (FCCM, 1997)

Hades: fast hardware synthesis tools and a reconfigurable coprocessor. - Stefan H.-M. Ludwig (1997)

Fast Integrated Tools for Circuit Design with FPGAs. - Stephan W. Gehring; Stefan H.-M. Ludwig (FPGA, 1998)

Implementing Photoshop Filters in Virtex. - Stefan H.-M. Ludwig; Robert Slous; Satnam Singh (FPL, 1999)