The aristocracy of Norman England

Green, Judith A.
Cambridge, U.K. ; New York : Cambridge University Press, 1997.

The continuity of the conquest : Charlemagne and Anglo-Norman imperialism

Hoofnagle, Wendy Marie, author.
University Park, Pennsylvania : The Pennsylvania State University Press, [2016]

The government of England under Henry I

Green, Judith A.
Cambridge [Cambridgeshire] ; New York : Cambridge University Press, 1986.

Roger of Salisbury, viceroy of England

Kealey, Edward J.
Berkeley : University of California Press, 1972.