G. KRISHNAN, and S. SUPRABHA. “Synthesis, Characterization, Antimicrobial And Antitumour Studies Of A Series Of Co(Ii) And Cu(Ii) Complexes Derived From Namidino-N1-Naphthylthiourea”. International Journal of Pharma and Bio Sciences, vol. 3, no. 1, Mar. 2012, pp. 426-40, https://ijpbs.net/index.php/journal/article/view/1271.