Evaluation of hilbert space techniques and lagrange's method for the analysis of dissipated power in DC circuits. - Horia Andrei; Fanica Spinei; Paul Andrei; Ulrich L. Rohde; Marius Alexandru Silaghi; Helga Maria Silaghi (ECCTD, 2009)

Contributions on sensitivity analysis for the analog two-port networks in non-sinusoidal regime. - Horia Andrei; Lucian Nastase; Emil Mihai Diaconu; Costin Cepisca; Sorin Dan Grigorescu; Paul Andrei (EUROCON, 2011)

Harmonic Analysis for Linear Circuits Based on Voltage Relative Values and Standard Limits. - Bogdan Enache; Paul Cristian Andrei; Costin Cepisca; Horia Andrei (ECAI, 2018)