@ARTICLE {6296, author={N. Paunkovic and J. Bouda and P. Mateus}, doi={10.1103/PhysRevA.84.062331}, journal={Physical Review A - Atomic, Molecular, and Optical Physics}, title={Fair and Optimistic Quantum Contract Signing}, year={2011}, month={December}, volume={84}, number={6}, pages={062331-062331}, ISSN={1050-2947} }