LANCE, A., T. SYMUL, W. P. BOWEN, B. C. SANDERS,
T. TYC, T. C. RALPH and P. K. LAM. Continuous-variable quantum-state sharing via quantum disentanglement.
Physical Review A. New York: American physical society, 2005, vol. 71, No 33814, p. 1-11. ISSN 1050-2947.