Kousya, S.M. El-, R.M. Mohare, M. Riadb, and M.H. Elnagdi. 1998. “?STUDIES WITH POLYFUNCTIONALLY SUBSTITUTED HETEROAROMATIC COMPOUNDS: SYNTHESIS OF SOME NEW POLYFUNCTION,ALLY SUBSTITUTED PYRIDO [3, 2-C]- PYRIDINES ANDPYRIDO [2,3-C]-PYRIDAZINES”. Biological Sciences - PJSIR 41 (2):81-85. https://v2.pjsir.org/index.php/biological-sciences/article/view/2238.