1. Airline Business, 2001. Vol. 17, no. 9, pp. 64–72.
2. Airline Business, 2001a. KLM and Eurowings break up. Vol. 17, no. 1.
3. Airline Business, 2001b. A Swiss family row. Vol. 17, no. 11, pp. 34–35.
4. Airline Business, 2001c. Vol. 17, no. 7, pp. 49–70.
5. Air Transport Intelligence News, 2000. Deutsche BA protests Lufthansa/Eurowings tie-up.