ČIŽMÁR, Ján. BIRATIONALE TRANSFORMATIONEN (EIN HISTORISCHER ÜBERBLICK) Periodica Polytechnica Mechanical Engineering, [S. l.], v. 39, n. 1, p. 9–24, 1995. Disponível em: https://www.pp.bme.hu/me/article/view/5494. Acesso em: 22 may. 2025.