1. Anderson E, Fornell C, Rust R (1997) Customer Satisfaction, Productivity and Profitability: Differences between Goods and Services. Marketing Science 16:129–145
2. Ansoff H (1988) The New Corporate Strategy. Wiley, New York
3. Barney J (1991) Firm Resources and Sustained Competitive Advantage. Journal of Ma-nagement 17:99–120
4. Barth K, Hartmann M, Schröder H (2007) Betriebswirtschaftslehre des Handels, 6. Aufl. Gabler, Wiesbaden
5. Baumgärtner M, Bienzeisler B (2006) Dienstleistungsproduktivität. Fraunhofer IRB, Stuttgart