PACS:76.30.Fc, 84.40.Ik, 42.50.Pq, 71.70.Jp (all) DOI:10.1070/PU1962v005n03ABEH003424 URL: https://ufn.ru/en/articles/1962/3/b/ Citation: Karlov N V, Prokhorov A M, Kornienko L S, Manenkov A A, Zverev G M "Application of paramagnetic crystals in quantum electronics" Sov. Phys. Usp.5 401–429 (1962)