Keitel, Christoph H. Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;
http://link.aps.org/doi/10.1103/PhysRevA.65.042312 (Publisher version)
Zeng, G., & Keitel, C. H. (2002). Arbitrated quantum-signature scheme. Physical Review. A, 64(4): 042312. doi:10.1103/PhysRevA.65.042312.