Effect of Ta5+ substitution for Mn on the ground state of La0.67Ca0.33MnO3L. Seetha Lakshmi, K. Dörr, K. Nenkov, A. Handstein, V. S. Sastry and K.-H. MüllerEur. Phys. J. B, 58 2 (2007) 115-121DOI: https://doi.org/10.1140/epjb/e2007-00218-0