On the Diophantine equations z2 = k(k2 + 3) and z2 = k(k2 + 12). J Bangladesh Acad Sci [Internet]. 2021 Jul. 15 [cited 2026 Jun. 25];45(1):127-9. Available from: https://banglajol.info/index.php/JBAS/article/view/54265