PANDA, A. C.; MISHRA, D. A Class Of Diameter Six Graceful Trees. JOURNAL OF ADVANCES IN MATHEMATICS, [S. l.], v. 9, n. 5, p. 2677–2686, 2014. DOI: 10.24297/jam.v9i5.2346. Disponível em: https://rajpub.com/index.php/jam/article/view/2346. Acesso em: 18 jul. 2024.