R. MATHU PRITHA; A. AMUTHA. Minimum Tree t-Spanners on Fuzzy Ratio Labelled General Graphs - NP Complete. Utilitas Mathematica , [S. l.], v. 122, n. 2, p. 1110–1130, 2025. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/2823. Acesso em: 7 may. 2026.