References
- Economic Development Agency of Tübingen, Germany
- Federal Ministry of Economy, Energy and Tourism, Austria
- German Youth Hostel Association Bavaria, Germany
- Gesundheitsresort Rosenalp in Oberstaufen, Germany
- Grand Hotel Trois Rois (5-star) in Basel, Switzerland
- Grand Hotel Zell am See (4-star), Austria
- Großglockner High Alpine Road, Austria
- Hote La Perla (5-star) in Corvara, Italy
- Hotel Alpenrose - Die Wellnessresidenz in Maurach, Austria
- Hotel Alpine Hideaway & Spa Resort Klosterhof (4-star) in Bayerisch Gmein, Germany