1. K. Mahler, “On the coefficients of transformation polynomials for the modular function,” Bull. Austral. Math. Soc. 10, 197–218 (1974).
2. P. Cohen, “On the coefficients of the transformation polynomials for the ellipticmodular function,” Math. Proc. Cambridge Philos. Soc. 95(3), 389–402 (1984).
3. P. Grinspan, “A measure of simultaneous approximation for quasi-modular functions,” Ramanujan J. 5(1), 21–45 (2001).
4. S. Lang, Elliptic Functions (Addison-Wesley, Reading, Mass., 1973; Nauka, Moscow, 1984).
5. N. I. Akhiezer, Elements of the Theory of Elliptic Functions (Gosudarstv. Izdat. Tekhn.-Teor. Lit., Moscow-Leningrad, 1948) [in Russian].