Katja Lenz / Ruth Möhlig (Hrsg.) (2002): Of Dyuersitie & Chaunge of Langage. Heidelberg: C. Winter.
Katja Lenz (1999): Die schottische Sprache im modernen Drama. Heidelberg: C. Winter.
Beiträge in Sammelbänden
Katja Lenz / Evelyn Hantson & Ruth Möhlig (2002): "A cover-all word-formation pattern? All-formations in English. In: Sybil Scholz / Monika Klages (Hrsg.) (2002): Language: Context and Cognition. Papers in Honour of Wolf-Dietrich Balds 60th Birthday. München: Langenscheidt-Longman, 149-69.
Katja Lenz (2002): "Losses and gains - the case of Scots in Scotland". In: Gerardo Mazzaferro (Hrsg.) (2002): The English Language and Power. Alessandria: Edizioni dellOrso, 181-200.
Beiträge in Zeitschriften
Katja Lenz (2000): "The use of obsolete Scots vocabulary in modern Scottish plays". International Journal of Scottish Theatre, 1/1 [http://arts.qmuc.ac.uk/ijost/Volume1_no1/K_Lenz.htm ]
Katja Lenz (2000): "A proposed method of characterizing literary Scots - a study in dramatic texts". Anglia, 118/2, 185-216.
Katja Lenz (2000): "A peripheral problem? The use of Scots in plays set outwith the Central Belt of Scotland". Revista Canaria de Estudios Ingleses, 41, 29-42.
Katja Lenz (1996): "Modern Scottish Drama: Snakes in Iceland - Drama in Scotland?". Zeitschrift für Anglistik und Amerikanistik, 44/4, 301-16.