1. J. Alcántara-Bode, “Some properties of the Beurling function,” Pro Mathematica 14(27–28) (2000), 5–11.
2. L. Báez-Duarte, “A strengthening of the Nyman-Beurling criterion for the Riemann hypothesis,” Rend. Mat. Ac. Lincei, S. 9, 14 (2003) 1, 5–11.
3. L. Báez-Duarte, M. Balazard, B. Landreau, et E. Saias, Notes sur la fonction ζ de Riemann, 3, Adv. in Math. 149 (2000), 130–144.
4. L. Báez-Duarte, M. Balazard, B. Landreau, et E. Saias, Sur l’autocorrélation multiplicative de la fonction partie fractionnaire, arXiv : math.NT/0306251.
5. A. Beurling, “A closure problem related to the Riemann Zeta-function,” Proc. Nat. Acad. Sci. 41 (1955), 312–314.