1. A New English Grammar, with Very Copious Exercises, and a Systematic View of the Formation and Derivation of Words;Allen,1841
2. Norm vs.variation in British English strong verbs: the case of past tense sang vs. sung;Anderwald;English Language and Linguistics,2011
3. On the progress of the progressive in the private correspondence of famous British people (1800–1880);Arnaud,1983
4. The development of the progressive in 19th century English: a quantitative survey;Arnaud;Language Variation and Change,1998
5. Real and apparent time;Bailey,2002