Betcke, Marta M., and Heinrich Voss. “Restarting Projection Methods for Rational Eigenproblems Arising in fluid‐solid Vibrations”. Mathematical Modelling and Analysis 13, no. 2 (June 30, 2008): 171-182. Accessed January 6, 2025. https://mla.vgtu.lt/index.php/MMA/article/view/7000.