Thorsten Gruber, Alexander Reppel, Isabelle Szmigin and Roediger Voss. Revealing the Expectations and Preferences of Complaining Customers by Combining the Laddering Interviewing Technique with Kano Model of Customer Satisfaction, Qualitative Market Research 11, № 4 (2008). С. 400–413. Также см. Rosemary P. Ramsey and Ravi S. Sohi, Listening to Your Customers: The Impact of Perceived Salesperson Listening Behavior on Relationship Outcomes, Journal of the Academy of Marketing Science 25 (весна 1997). С. 127–137.