Textbook Fundamentals of Service Systems
http://fundamentals-of-service-systems.org/emailform.php?id=6DnExH53cx5cEhmOE0GkaZNfEul5jNvn5TeuuntHQIrF0RRismaa%2FCw3v8caCejgdMA8AvnqcHDWmpsTpEHTcRwd0kvXbdDZD4b9QZll35Z8jY1fY6woNpIiIDunMPoTC5a6T3P0QEnEt5U8NkZgMg%3D%3D