Always convergent piecewise-linear DC analysis by an appropriate choice of initial conditions. - Janne Roos; Ville Karanko (ISCAS, 2000)

Least squares solution of nearly square overdetermined sparse linear systems. - Ville Karanko; Mikko Honkala (ISCAS (4), 2002)

Frequency/time block preconditioners for harmonic balance jacobians. - Mikko Honkala; Ville Karanko; Janne Roos; Martti Valtonen (ECCTD, 2009)