An axiomatization of Nesterenko's method and applications on Mahler functions II Thomas Töpfer — 1995 Compositio Mathematica
On the Transcendence and Algebraic Independence of Certain Continued Fractions. Thomas Töpfer — 1994 Monatshefte für Mathematik
Algebraic independence of the values of generalized Mahler functions Thomas Töpfer — 1995 Acta Arithmetica
Zero order estimates for functions satisfying generalized functional equations of Mahler type Thomas Töpfer — 1998 Acta Arithmetica