"ImprintArchived 29 April 2011 at the Wayback Machine." Helvetic Airways. Retrieved on 6 November 2009. "Helvetic Airways AG P.O. Box 250 CH-8058 Zurich Airport"
"ImprintArchived 29 April 2011 at the Wayback Machine." Helvetic Airways. Retrieved on 6 November 2009. "Helvetic Airways AG P.O. Box 250 CH-8058 Zurich Airport"