“?MIXED LIGAND COMPLEXES OF BIVALENT METAL IONS WITH 4,6-DIAMINO 2-HYDROXYPYRIMIDINE”. Biological Sciences - PJSIR 41, no. 3 (June 22, 1998): 128–131. Accessed March 10, 2026. https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2251.