Tambade, P., B. Shelke, S. Kushare, and M. Gaware. “A SIMPLE, GREEN AND EXPEDITIOUS SYNTHESIS OF SALEN OF 2-HYDROXY 1- NAPTHALDEHYDE WITH ETHYLENE DIAMINE IN WATER AND ITS COMPLEXATION WITH VARIOUS TRANSITION METALS (CU, CO, FE AND NI) EXPLORING ULTRASOUND WAVES.”. Journal of Advanced Scientific Research, Vol. 10, no. 04, Nov. 2019, pp. 48-52, http://sciensage.info/index.php/JASR/article/view/328.