Selected results from the rational number project
In: Proceedings of the Ninth International Conference for the Psychology of Mathematics Education, Jg. vol. 1: Individual contributions, S. 342-3511985
Sharpening one's diagnostic skill by simulating students' error behaviors
In: Focus on learning problems in mathematics, Jg. 9 H. 2, S. 43-561987Spurious solutions for discrete superlinear boundary value problems
In: Computing, Jg. 28 H. 1, S. 43-511982Synthetic anthracyclinones, XXIX: quinone antibiotics with five substituents at the hydroaromatic ring
In: Liebigs Annalen der Chemie, Jg. 1985 H. 7, S. 1311-13281985