New company Space Perspective wants to take you to the stratosphere via high -altitude balloon - The Verge
Aerospace | Free Full-Text | Dynamic Characterization of a High-Altitude Balloon during a Flight Campaign for the Detection of ISM Radio Background in the Stratosphere
UK selects high-altitude balloon as military satellite | Popular Science
High-altitude balloons: a scientists' guide to what's up there and why
High-altitude balloon fleet to provide high-res imagery, analyt...
The Russian adventurer who is heading to the stratosphere - BBC News