SAHU, K. and KUMAR SAHU, R. 2010. Tetranuclear Metal Chelates of Nickel(II) with 1,2,5,6-Tetraphenyl-3,4-diaza-1,6-dihydroxyimino-2, 4-hexadiene. Asian Journal of Chemistry. 8, 2 (Jun. 2010), 229–231.