M. Naeem Khan, M. Ain Khan, S. Rehman, M. Khalid Saeed, and M. Ali Munawar, “Microwave Assisted Synthesis of Biologically Active 7-Benzylideneamino-5H-thiochromeno[2,3-b]pyridin-5-one”, ajc, vol. 23, no. 11, pp. 5061–5065, Sep. 2011.