Implementation of piecewise-linear DC analysis in APLAC. - Janne Roos; Martti Valtonen; Jarmo Virtanen (ICECS, 2002)

Enhanced multivariate steady-state time-domain method. - Tuukka Tuomisto; Anu Lehtovuori; Jarmo Virtanen; Janne Roos; Mikko Honkala; Martti Valtonen (ECCTD, 2009)