Development of elliptic functions according to Ramanujan - Venkatachaliengar, K. (World Scientific, 2012)
Originally published as a Technical Report 2 by Madurai Kamaraj University in February, 1988
The basic identity -- The differential equations of P, Q and R -- The Jordan-Kronecker function -- The Weierstrassian invariants -- The Weierstrassian invariants, II -- Development of elliptic functions -- The modular function [Lambda]