RAPIN , V. . Error of small parameter methods in solving shortened equations of a synchronized oscillator . Radiotekhnika, [S. l.], v. 2, n. 205, p. 113–117, 2021. DOI: 10.30837/rt.2021.2.205.12. Disponível em: http://rt.nure.ua/article/view/239525. Acesso em: 24 apr. 2024.