@article{GeerkensEwert, author = {Geerkens, Anja and Ewert, Siegfried}, title = {Nonlinear Effects of Sound Waves in High-Tc-Superconductors}, series = {Journal de Physique IV}, journal = {Journal de Physique IV}, number = {6}, issn = {1155-4339}, pages = {465 -- 468}, language = {en} }