Investigations of the EPR parameters and local structures for the substitutional Cu2+ centers in the tungstatesH.-M. Zhang, S.-Y. Wu, P. Xu, L.-L. Li and S.-X. ZhangEur. Phys. J. Appl. Phys., 50 3 (2010) 30901DOI: https://doi.org/10.1051/epjap/2010052