Pfenninger, Simone E. and Timofeeva, Olga and Gardner, Anne-Christine and Honkapohja, Alpo and Hundt, Marianne and Schreier, Daniel (ed.): 'Contact, Variation, and Change in the History of English' (2014), John Benjamins, https://www.jbe-platform.com/content/books/9789027269935