Read the church government texts of the Pauline corpus, for example, or the concerns of apostolicity in acts. (nakedpastor.com)
But they also insisted that apostolicity meant being in communion with the Church's bishops. (firstthings.com)
We now know not only that none of the Old Testament writings is prophetic witness to Christ in the sense in which the early church assumed them to be, but also that none of the writings of the New Testament is apostolic witness to Christ as the early church itself understood apostolicity. (religion-online.org)