Question:

How to display Publications on the Account Timeline?  

Answer:

In order for the Publication to display on the Timeline, it must be used with the Stakeholder_Publication_vod as the intersecting object.

There should be a Stakeholder_Publication_vod record that references the Account and the publication. The Publication is not displayed if the Publication.Account is populated as the only reference to the Account.

Related Documentation:

CRM Help Documentation: Using the Timeline View