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Islam, S.M.S. and Kafi Majumdar, A.A. 2021. On the Diophantine equations z<sup>2</sup> = k(k<sup>2</sup> + 3) and z<sup>2</sup> = k(k<sup>2</sup> + 12). Journal of Bangladesh Academy of Sciences. 45, 1 (Jul. 2021), 127–129. DOI:https://doi.org/10.3329/jbas.v45i1.54265.