P. K. Pande, J. C. Ghyldiyal, and P. Gautam, “Secondary Xylem Anatomy of Root and Stem of <I>Alstonia scholais</I>, <I>Bischhiofia javanica</I> and <I>Trewia nudiflora</I>: The Characteristic Plant Species of Manu Fresh Water Swamp, Rishikesh, Dehradun (India)”, Indian Forester, vol. 139, no. 8, pp. 726–730, Aug. 2013.