Textbook Fundamentals of Service Systems
http://fundamentals-of-service-systems.org/emailform.php?id=79r0nmwtS8py2IeYpMFJ%2F%2BEgwsmV6A3VldSlWhjSkfNLUfiOA74Cp%2BDdxrtCo4XLvdYYEfijbgLg5ZPhSGGMum%2FguBzv8C05iUAzIqgrCM19Vlgvs8y0NpMImV%2BCgzixIeRRhoFf0VEQlTo3xX6GJw%3D%3D