YADAV, R. Signed graphs connected with the root lattice. BIBECHANA, [S. l.], v. 11, p. 157–160, 2014. DOI: 10.3126/bibechana.v11i0.10396. Disponível em: https://nepjol.info./index.php/BIBECHANA/article/view/10396. Acesso em: 26 dec. 2024.