TY - GEN T1 - Longitudinal oscillations in density stratified and expanding ÎÛÎÛ²ÝÝ®ÊÓÆµ waveguides T2 - arXiv PY - 2012/04/18 AU - Luna-Cardozo M AU - Verth G AU - Erdélyi R ED - Y2 - 2025/07/01 ER -