Physics Letters A
Physics Letters A > 2010 > 374 > 19-20 > 2069-2074
Physics Letters A > 2010 > 374 > 28 > 2874-2878
Physics Letters A > 2010 > 374 > 28 > 2865-2873
Physics Letters A > 2010 > 374 > 19-20 > 2069-2074
Physics Letters A > 2010 > 374 > 28 > 2874-2878
Physics Letters A > 2010 > 374 > 28 > 2865-2873