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The zig-zag chain as an extremal value of VDB topological indices of polyomino chains

open access: yes, 2016
We give conditions on the numbers under which a vertex-degree-based topological index T I of the form T I where G is a graph with n vertices and m is the number of ij-edges, has the zigzag chain as an extreme value among all polyomino chains.
Rada Rincón, Juan Pablo
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