This article about punctuation marks mainly in the Dunhuang manuscripts came out recently. It is sort of an inventory of the most important types of marks used in the manuscripts, although it is certainly not complete in its scope.
Imre Galambos, “Punctuation marks in medieval Chinese manuscripts.” In Jörg Quenzer and Jan-Ulrich Sobisch, eds., Manuscript Cultures: Mapping the Field. Berlin, New York: de Gruyter: 341–357.
Repetition marks in Dunhuang manuscripts