IRANMANESH, ALI; PAKRAVESH Y.; MAHMIANI A. PI index and edge-szeged index of HC5C7[k, p] nanotubes. Utilitas Mathematica , [S. l.], v. 77, 2008. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/535. Acesso em: 8 may. 2026.