It is used in the Montenegrin alphabet, where it represents the voiceless alveolo-palatal sibilant /ɕ/.
[1] It is not to be confused with the Latin Ć, which represents the voiceless alveolo-palatal affricate /t͡ɕ/ (the sound of Ћ).
It was proposed by Lazar Tomanović, Montenegrin attorney, journalist and politician.
He proposed the use of a Cyrillic digraph шј to represent the sound.
[2] The first instance of usage of the accented Cyrillic letter с́ was in 1926 by Danilo Vušović.