WATOPT – An Optimizer for Circuit Applications. - Rakesh Chadha; Kishore Singhal; Jirí Vlach; Ernst Christen; Milan Vlach (IEEE Trans. Comput. Aided Des. Integr. Circuits Syst., 1987)

NETOPT-a program for multiobjective design of linear networks. - Ernst Christen; Jirí Vlach (IEEE Trans. Comput. Aided Des. Integr. Circuits Syst., 1988)

VHDL 1076.1 - analog and mixed signal extensions to VHDL. - Ernst Christen; Kenneth Bakalar (EURO-DAC, 1996)

Open ended dynamic ramping simulation of multi-discipline systems. - Leonid B. Goldgeisser; Ernst Christen; Milan Vlach; Joachim Langenwalter (ISCAS (5), 2001)

Mixed Nets, Conversion Models, and VHDL-AMS. - J. Shields; Ernst Christen (FDL, 2004)

Tolerance Models in Hardware Description Languages. - Ernst Christen (FDL, 2005)

Modeling Safe Operating Area in Hardware Description Languages. - Leonid B. Goldgeisser; Ernst Christen; Zhichao Deng (DAC, 2007)

Statistical Modeling with VHDL-AMS. - Ernst Christen; David Bedrosian; Joachim Haase (FDL, 2007)