1. A Plan for Long Duration Scientific Ballooning;White,1983
2. Stresses in a Partially Inflated Free Balloon - with Notes on Optimum Design and Performance for Stratospheric Exploration;Upson Ralph;Journal of the Aeronautical Sciences,1989
3. Overpressurized Zero Pressure Balloon System;Simpson Joel,1991
4. Polar Patrol Balloon;Hirasawa,1991
5. Balloons, Tools for Studying the Stratosphere;Pommereau,1990