Pauly, A., Davis, C., Hirschfeldt, D., Hirst, J., Pardo, J., & Yokoyama, K. (2019). Combinatorial principles equivalent to weak induction. Computability, pp. 1-12. doi:10.3233/COM-180244

Pauly, Arno, Caleb Davis, Denis R Hirschfeldt, Jeffry Hirst, Jake Pardo, and Keita Yokoyama. "Combinatorial Principles Equivalent to Weak Induction." Computability 2019: 1-12.

Pauly, Arno, et al. "Combinatorial Principles Equivalent to Weak Induction." Computability 2019: 1-12.