@Article{angeo-27-1331-2009,
AUTHOR = {Zecha, M. and R\"ottger, J.},
TITLE = {Occurrence of polar mesosphere summer echoes at very high latitudes},
JOURNAL = {Annales Geophysicae},
VOLUME = {27},
YEAR = {2009},
NUMBER = {3},
PAGES = {1331--1342},
URL = {https://angeo.copernicus.org/articles/27/1331/2009/},
DOI = {10.5194/angeo-27-1331-2009}
}