Electroconductivity, thermoelectrical properties and ESR spectroscopy of copper chromite ceramic samples doped with magnesium - V. A. Kulbachinskij; V. G. Kytin; Ju. Kondrateva; E. A. Konstantinova; A. V. Pavlikov; A. N. Grigorev; A. S. Mankevich; I. E. Korsakov (Low Temperature Physics, 2019)