Kötzing, Timo Algorithms and Complexity, MPI for Informatics, Max Planck Society;
Jain, S., Kötzing, T., & Stephan, F. (2012). Enlarging Learnable Classes. In N. Bshouty, G. Stoltz, N. Vayatis, & T. Zeugmann (Eds.), Algorithmic Learning Theory (pp. 36-50). Berlin: Springer.