Authors:
BALSIGER F
KOPP E
FRIEDRICH M
TORKAR KM
WALCHLI U
Citation: F. Balsiger et al., SMALL-SCALE STRUCTURE OF O2+ AND PROTON HYDRATES IN A NOCTILUCENT CLOUD AND POLAR MESOSPHERIC SUMMER ECHO OF AUGUST 9 10 1991 ABOVE KIRUNA/, Geophysical research letters, 20(20), 1993, pp. 2315-2318