Daniel Abondolo(1987).“Hungarian”.InBernard Comrie.The World's Major Languages.Croom Helm.pp.577-592.ISBN0709934238
Michael Branch(1987).“Finnish”.InBernard Comrie.The World's Major Languages.Croom Helm.pp.593-617.ISBN0709934238
Maria Koptjevskaja-Tamm;Bernhald Wälchli(2001).“The Circum-Baltic Languages”.InÖsten Dahl, Maria Koptjevskaja-Tamm.The Circum-Baltic Languages: Typology and Contact.2.John Benjamins.pp.615-750.ISBN9027230595