Textbook Fundamentals of Service Systems
http://fundamentals-of-service-systems.org/emailform.php?id=Rwg3BMNgzPikm1s3Tb%2BIXnxMambPwskm3thaQgG8vhy3zdkN%2BJDVcsj4Ui8u6SoWMtq08pYEKLhUBgev3okidxRfck6JJkJumaTMFq5hqlmwh6DSjAl81wNwELvlxga7QmNg07%2BPzWIaiqpz42pSlA%3D%3D