Investigation of DC current models in Co2+ and Ti4+ substituted M-type BaCox Tix Fe(12-2x) O19 ferriteVikas Bhikhan, Charanjeet Singh, Rajneesh Kaur, Maciej Jaroszewski and S. Bindra NarangEur. Phys. J. B, 88 12 (2015) 325DOI: https://doi.org/10.1140/epjb/e2015-60513-7