Phonon echo probing of high-temperature superconductors containing magnetic ions.Published in:Technical Physics Letters, 2007, v. 33, n. 12, p. 1050, doi. 10.1134/S106378500712019XBy:Pleshakov, I. V.;Nechitaĭlov, A. A.;Paugurt, A. P.;Matveev, V. V.;Fofanov, Ya. A.;Ylinen, EeroPublication type:Article