A. Dandia, N. Ahmed, V. Sehgal, and M. Saha, “Synthesis of Fluorine Containing Tetracyclic Ring Systems: 1,2,4-triazino [3’,4’,3,4] [1,2,4] triazino [5,6-b] Indole and 1,2-4-triazino [4’,3’:2,3] [1,2,4] triazino [5,6-b] Indole ”, ajc, vol. 9, no. 3, pp. 501–508, Mar. 2010.