@Article{angeo-25-2139-2007,
AUTHOR = {Sica, R. J. and Argall, P. S.},
TITLE = {Seasonal and nightly variations of gravity-wave energy density in the middle atmosphere measured by the Purple Crow Lidar},
JOURNAL = {Annales Geophysicae},
VOLUME = {25},
YEAR = {2007},
NUMBER = {10},
PAGES = {2139--2145},
URL = {http://www.ann-geophys.net/25/2139/2007/},
DOI = {10.5194/angeo-25-2139-2007}
}