M. Ng, P.B. Gibbons, E. Calude, P. Lorimer, and G.J. Tee

---

J.C. Butcher, D.S. Bridges, P.Barry, L.S. Dediu, P.C. Bonnington, and M. Atkenson

---

R.G. Downey, M. Conder, J. Hosking, and B. Khoussianov

---

C. Shu, ???, M. Ng, and M.J. Dinneen

---

M. Ng, M.J. Dinneen, M.C. Wilson, and E. Calude