It is not a question, he repeats, of rejecting the entire Saussurian project or denying its historical significance

Derrida dismissed the Saussurean hypothesis that language is a stable ‘system of differences’, therewith marking one of the ways in which the transition from structuralism to poststructuralism was made.

The Prague school of linguistics [...] elaborated the ideas of the Formalists, but systematized them more firmly within the framework of Saussurean linguistics

Language is Barthes's theme from beginning to end, and in particular the Saussurean insight that the sign is always a matter of historical and cultural convention.

this vast science of signs which Saussure postulated some forty years ago under the name of semiology

Lacan's Saussurian Signifier/signified equation