Textbook Fundamentals of Service Systems
http://fundamentals-of-service-systems.org/emailform.php?id=TEK6eouHij2hUccOqonKYhgYoq%2BUbYsAXJfrEdRWtV4LdKdbeYXPp2z0X83uBRzkUlrRf942UxOL3aAp0AVjezNVNfhLZdpC%2B%2FOgr%2Bq6qXYcimwIehC5TH%2FOmnbUL1MMce6K3%2FQUE7UnEjs9rEUC%2Fw%3D%3D