Microwave absorption in YBa2Cu3O7-δ single crystals in a magnetic field Bogachev, S. V. ; Emel'Chenko, G. A. ; Il'in, V. A. ; Konnikov, S. G. ; Kosogov, A. O. ; Kosogov, O. V. ; Tatarchenko, V. A. ; Tret'yakov, V. I. Abstract Publication: Soviet Journal of Experimental and Theoretical Physics Letters Pub Date: February 1988 Bibcode: 1988JETPL..47..203B