optionality

Sources

• TRASK 1993 95

  TRASK, R. L. (1993) A Dictionary of Grammatical Terms in Linguistics. New York: Routledge.

• GRIMES 1975 163-164 (also "cohesive optionality", "semantic optionality")

  GRIMES, Joseph E. (1975) The Thread of Discourse. The Hague: Mouton.

• SIERTSEMA 1955 191 (facultativity -GL)

  SIERTSEMA, B. (1955) A Study of Glossematics: Critical Survey of its Fundamental Concepts. The Hague: Martinus Nijhoff.

• HJELMSLEV 1961[trans.] 93 (facultativity -GL)

  HJELMSLEV, Louis. (1961 [trans.]) Prolegomena to a Theory of Language. Trans. by Francis J. Whitfield. Madison: University of Wisconsin Press.