@BOOK{Nijholt27256:2017,
 editor={A. Nijholt},
 title={Playable Cities: The City as a Digital Playground},
 publisher={Springer Verlag},
 year=2017,
 series={Gaming Media and Social Effects},
 address={Singapore},
 note={ISBN=978-981-10-1961-6},
}
\footnote{This Unique BiBTeX-key-identifier is generated, because the author did not insert a value into the database}