Selim, N. M.; Arief, M. H.; Ahmed, M. H. Synthesis of Some Heterocyclic Compounds Based on (2, 3-Dioxo-2, 3-Dihydro-1H-Indol-1-Yl) Acetyl Acetic Acid Derivatives. IJBAS 2013, 2 (2), 153-159. https://doi.org/10.14419/ijbas.v2i2.721.