Pavankumar V. Solanki, Pramod A. Dhokrat, Sekhar Babu Uppelli and Vijayavitthal T. Mathad 2015. A Facile Synthesis of 1-(4-nitrophenyl)-3-morpholine-4-yl-5,6-dihydropyridin-2(1H)-one, A key Intermediate of Apixaban-An anticoagulant Drug. World Journal of Pharmaceutical Sciences. 3, 9 (Sep. 2015), 1866–1871.