Zipf, G. K. (1929). Relative frequency as a determinant of phonetic change. Harvard Studies in Classical Philology, 40, 1-95. doi:10.2307/310585. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)
Zipf, G. K. (1929). Relative frequency as a determinant of phonetic change. Harvard Studies in Classical Philology, 40, 1-95. doi:10.2307/310585. [FULLTEXT]