1. Another example of higher order randomness;Becher;Fund. Inform.,2002
2. A highly random number;Becher,2001
3. Random reals and possibly infinite computations, I;Becher;J. Symbolic Logic,2005
4. From index sets to randomness in ∅n, II;Becher;J. Symbolic Logic,2009
5. Recursion Theory, A Generalized Point of View;Chong,2015