Quantum coherent tunneling between two atomic-molecular Bose-Einstein condensates F. Kh. Abdullaev, R. A. Kraenkel and B. A. Umarov Eur. Phys. J. D, 30 3 (2004) 369-377 Published online: 10 August 2004 DOI: 10.1140/epjd/e2004-00098-x