SCHNEIDER, Klaus R. The point charge oscillator: qualitative and analytical investigations. Mathematical Modelling and Analysis, [S. l.], v. 24, n. 3, p. 372–384, 2019. DOI: 10.3846/mma.2019.023. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/5387. Acesso em: 9 may. 2025.