- E. Herrmann, I. Járási, and A. Pethő, Note on: "The Diophantine equation xn=Dy2 + 1" by J. H. E. Cohn, Acta Arith. 113 (2004), no. 1, 69–76.[MR]
- E. Herrmann, F. Luca, and P. G. Walsh, A note on the Ramanujan-Nagell equation, Publ. Math. Debrecen 64 (2004), no. 1-2, 21–30.[MR]
- Emanuel Herrmann and Attila Pethő, S-integral points on elliptic curves. Notes on a paper of B. M. M. de Weger, J. Théor. Nombres Bordeaux 13 (2001), no. 2, 443–451.[MR]