The Age of Turmoil,
Santos, Ricardo
, Fronteras: a history of the Latin American Church in the USA since 1513, Volume X, San Antonio, TX, p.142-168, (1983)
Was There a "The Church" in the Middle Ages,
Macy, Gary
, Unity and Diversity in the Church: papers read at the 1994 Summer Meeting, and the 1995 Winter Meeting of the Ecclesiastical Historical Society, Cambridge, MA, p.107-116, (1996)