BÉDA, Gyula; BÉDA, Péter B. Conditional Lagrange Derivative with Gibbs Function. Periodica Polytechnica Mechanical Engineering, [S. l.], v. 59, n. 1, p. 48–50, 2015. 10.3311/PPme.7141. Disponível em: https://pp5.omikk.bme.hu/me/article/view/7141. Acesso em: 13 mar. 2025.