Textbook Fundamentals of Service Systems
http://fundamentals-of-service-systems.org/emailform.php?id=A36ujEJWXGUxdOptc2oR6yS%2BsMoeVVKfyDOnsUAxPl2QdjvjK%2BkuRDS3VBSlyNz25d0UR91B9njhaj0JS7D%2BWT4RkQ3rkMqGGxK5%2BR5xTk8aRg26mCZP2GRAN12YrLTGhrlT8iOWRLyJRH2SLmXebg%3D%3D