Parveenr, Rasheeda, Muhammad Aleem Ahmed, Shaheen A Husain, and Shahida Parveen. 2001. “?NEW DISPERSE DYES FROM SUBSTITUTED PYRIDINES. PART-I. SYNTHESIS OF METHYL-4, 6,DmYDROXY-20xo-L-PHENYL-5-ARYLAZOPYRIDINE-3-CARBOXYLATE AND THEIR DERIVATIVES”. Biological Sciences - PJSIR 44 (4):244-47. https://v2.pjsir.org/index.php/biological-sciences/article/view/1935.