There are two referential devices that can create cohesion: There is one more referential device, which cannot create cohesion: A homophoric reference is a generic phrase that obtains a specific meaning through knowledge of its context.
A simple written example: The younger child was very outgoing, the older much more reserved.
Lexical cohesion refers to the way related words are chosen to link elements of a text.
Collocation uses related words that typically go together or tend to repeat the same meaning.
A Bibliography of Coherence and Cohesion by Wolfram Bublitz at Universität Augsburg