@book { Heinze2006,
 title = {Wohnen im Alter : Trendreport ; Seniorenwirtschaft in Deutschland},
 author = {Heinze, Rolf G. and Naegele, Gerhard and Hilbert, Josef},
 pages = {29},
 year = {2006},
 url = {http://nbn-resolving.de/urn:nbn:de:0168-ssoar-121189},
}