J. VASUNDHARA DEVI; S.SRINIVASA RAO; I.S.N.R.G.BHARAT. Periodic boundary value problem for the graph differential equation and the matrix differential equation. Malaya Journal of Matematik, India, v. 3, n. 04, p. 598–606, 2015. DOI: 10.26637/mjm304/018. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/504. Acesso em: 16 jul. 2024.