* [http://www.sussex.ac.uk/linguistics/documents/essay_-_what_is_a_word.pdf What Is a Word?] - a working paper by Larry Trask, Department of Linguistics and English Language, University of Sussex.
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* [https://www.sussex.ac.uk/linguistics/documents/essay_-_what_is_a_word.pdf What Is a Word?] - a working paper by Larry Trask, Department of Linguistics and English Language, University of Sussex.