1. Cho, I.: Opreators induced by primes. Metheods Appl. Anal. 19(4), 313–340 (2013)
2. Cho, I.: Free Probability on Arithmetic Functions Determined by Gaps Between Primes. Collectanea Math. (Submitted, 2013)
3. Cho, I.: Classification on arithmetic functions and free-moment $$L$$ L -Functions. B. Korean Math. Soc. (Submitted, 2013)
4. Cho, I., Gillespie, T.: Real Numbers Acting on Arithmetic Functions. (Preprint, 2013)
5. Cho, I., Jorgensen, P.E.T.: Krein-Space Operators Induced by Dirichlet Characters, Special Issues: Contemp. Math. Amer. Math. Soc. (To Appear, 2013)