Long Duration Balloon flight from polar regions (Peterzen et al. ESA Symposium 2003 ESA-SP530 – St. Gallen) Workshop ASI sulle Tecnologie ElettroOttiche.
The Unusual Northern Polar Summer of 2002 by Richard A. Goldberg (NASA GSFC) Artem G. Feofilov (CUA/GSFC) Alexander A. Kutepov (CUA/GSFC) W. Dean Pesnell.
Long Duration Balloon flight from polar regions
