1. Encyclopedia of Mathematics and Its Applications;G.E. Andrews,1977
2. Dyson, F.J.: Three identities in combinatory analysis. J. Lond. Math. Soc. 18, 35–39 (1943)
3. Ramanujan, S.: Proof of certain identities in combinatory analysis. Proc. Camb. Philos. Soc. 19, 214–216 (1919)
4. Ramanujan, S.: Collected Papers. Cambridge University Press, Cambridge (1927). Reprinted by Chelsea, New York, 1962, reprinted by the American Mathematical Society, Providence, RI, 2000
5. Rogers, L.J.: On the expansion of some infinite products. Part 2. Proc. Lond. Math. Soc. 25, 318–343 (1894)