@book{Hubwieser.2007,

author = {Hubwieser, Peter and Spohrer, Mattias},

year = {2007},

title = {Tabellenkalkulationssysteme, Datenbanken: Sch\"ulerbuch f\"ur die Jahrgangsstufe 9},

address = {Stuttgart},

volume = {: Lehrwerk f\"ur Gymnasien ; 2},

publisher = {Klett},

isbn = {9783127316681},

series = {Informatik}

}