Madhudeepa Dey, and Siddhartha Sankar Dhar. “An Expeditious Green Synthesis of Benzimidazoles Using VO (acac)2 As Catalyst Under Microwave Irradiation”. Journal of International Academy of Physical Sciences, vol. 17, no. 4, Dec. 2013, pp. 395-02, https://www.iaps.org.in/journal/index.php/journaliaps/article/view/541.