A. Uma Maheswari, C. Ambika. New block-labelled topological indices and physicochemical properties of heptane isomers. A Canadian journal of applied mathematics, computer science and statistics [Internet]. 2025 May 8 [cited 2026 May 7];122(1):620-31. Available from: https://utilitasmathematica.com/index.php/Index/article/view/2165