NONLAOPON, K.; NUNTIGRANGJANA, T.; PUTJUSO, S. Distributional solutions of nth-order differential equations of the Bessel equation. RMUTSB ACADEMIC JOURNAL, Phra Nakorn Sri Ayutthaya, v. 5, n. 1, p. 1–10, 2017. Disponível em: https://li01.tci-thaijo.org/index.php/rmutsb-sci/article/view/99828. Acesso em: 4 may. 2024.