On the transcendence of certain power series of algebraic numbers P. Cijsouw; R. Tijdeman — 1973 Acta Arithmetica
Transcendence measures of certain numbers whose transcendency was proved by A. Baker P. L. Cijsouw — 1974 Compositio Mathematica
Transcendence measures of exponentials and logarithms of algebraic numbers P. L. Cijsouw — 1974 Compositio Mathematica