BUDAI, Csaba; SZILÁGYI, Brigitta. Alternative Method to Determine the Characteristic Polynomial Applying Three-by-Three Matrices. Periodica Polytechnica Civil Engineering, [S. l.], v. 59, n. 1, p. 59–63, 2015. 10.3311/PPci.7753. Disponível em: https://www.pp.bme.hu/ci/article/view/7753. Acesso em: 6 may. 2024.