C. JAYASEKARAN; A. VINOTH KUMAR; M. ASHWIN SHIJO. 2-Vertex self switching of umbrella graph. Malaya Journal of Matematik, India, v. 8, n. 04, p. 2359–2368, 2020. DOI: 10.26637/MJM0804/0183. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/1920. Acesso em: 16 jul. 2024.