Multivariate pressure effects on an electron hopping process in ferroelectric KTa1−xNbxO3Shimon E. Lerner, Yuri Feldman, Michal Mierzwa, Marian Paluch, Aharon J. Agranat and Paul Ben IshaiEur. Phys. J. B, 87 7 (2014) 158DOI: https://doi.org/10.1140/epjb/e2014-50197-x