A new era in the physiological investigation of linguistic sounds was opened up by X-ray photography.
Roman JakobsonThe function of poetry is to point out that the sign is not identical to the referent.
Roman JakobsonNow the identification of individual sounds by phonetic observation is an artificial way of proceeding.
Roman JakobsonEvery linguistic sign is located on two axes: the axis of simultaneity and that of succession.
Roman Jakobson