NAVICKAS, Z.; TELKSNYS, T.; RAGULSKIS, M. Special Multiplicative Operators for the Solution of ODE – Invariants and Representations. International Journal of Engineering and Technology Innovation, [S. l.], v. 5, n. 1, p. 01–18, 2015. Disponível em: https://ojs.imeti.org/index.php/IJETI/article/view/60. Acesso em: 23 apr. 2024.