Materials
Here you can download a generic dossier on KiteGen technology.
Here you can see the video showing how the KiteGen Stem works.
Here you can find some high definition images.
Here you can find the Atlas of high altitude wind power by Cristina L. Archer and Ken Caldeira.
Here the reaction paper to the recent (2018) Ecorys study: Challenges for the commercialization of Airborne Wind Energy Systems.