@incollection { Simmel1969,
 title = {Soziologie der Geselligkeit},
 author = {Simmel, Georg},
 pages = {1-16},
 year = {1969},
 publisher = {Sauer u. Auvermann},
 url = {http://nbn-resolving.de/urn:nbn:de:0168-ssoar-187880},
}