Asymmetry and separation of spin tunneling time in ZnSe/Zn1-xMnxSe multilayers Y. Guo, B. Wang, B.-L. Gu and Y. Kawazoe Eur. Phys. J. B, 23 4 (2001) 509-513 Published online: 15 October 2001 DOI: 10.1007/s100510170042