1. Jenkins P., Wilt D., Scheiman D., Anspaugh B., Pisczcor M., Snyder D., Ball D., Juneau J., Franco H., Orr D., Cannon S., Lorentzen J., Walters R., Krasowski M. and Reed B.. A new air mass zero calibration facility using the high altitude Balloon method. In Proceedings of the 9th European Space Power Conference, St. Raphaël, France, 2011.
2. Baur C., Siefer G., Kern R., Winter S.. Primary solar cell standards - comparison of extraterrestrial and synthetic calibration. In Proceedings of the 9th European Space Power Conference, St. Raphaël, France, 2011.