Thorsell, David. "Part I. Electron paramagnetic resonance studies of Gd³⁺ in single crystals ; Part II. An EPR investigation of deuterium isotope effects on the zero-field splittings of optically excited triplet molecules in single crystals at 77 K /." Doctoral dissertation, Ohio State University, 1971. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486730913206205Chicago Manual of Style (17th edition)