Andrew Sixsmith Sonja Meuller Felicitas Lull Michael Klein Ilse Bierhoff Sarah Delaney Robert Savage SOPRANO - An Ambient Assisted Living System for Supporting Older People at Home. 233-236 2009 ICOST http://dx.doi.org/10.1007/978-3-642-02868-7_30 conf/icost/2009 db/conf/icost/icost2009.html#SixsmithMLKBDS09