Janaki Ram, K. & Y. Radhakrishna. 1984. The distribution of freshwater mollusca in Guntur District (India) with a description of Scaphula nagarjunai sp. n. (Arcidae). Hydrobiologia 119: 49-55. Available electronically.
Janaki Ram & Radhakrishna, 1984. Hydrobiologia 119: 51, figs. 2-3.