Textbook Fundamentals of Service Systems
http://fundamentals-of-service-systems.org/emailform.php?id=qm80r29I75jjb84PzsSFi023n7S9kaK0mkCopMpMl8gYA%2Be%2FrBbAWEoLMLHyRDDT3AooW00eQNMffmtCcsSCWfXWAW0E4%2Fd%2BKOiVnuP%2B4Jf3n548eGX86coDGnA66%2FmOuUoiYIftKB4SQ2aMk26%2Fyw%3D%3D