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 The Analysis of r-dynamic Vertex Colouring on  Graph Operation Of Shackle.
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Available at: &lt;<a href="https://jurnal.unej.ac.id/index.php/prosiding/article/view/4259" target="_new">https://jurnal.unej.ac.id/index.php/prosiding/article/view/4259</a>&gt;. Date accessed: 05 may 2024.