N. Rama, MSR. Rao, V. Sankaranarayanan, P. Majewski, S. Gepraegs, M. Opel, R. Gross: A-site-disorder-dependent percolative transport and Griffiths phase in doped manganites. 2004Physical Review B: 70. ISBN 1098-0121 http://dx.doi.org/10.1103/PhysRevB.70.224424