A.D. 381 heretics, pagans, and the dawn of the monotheistic state ( PDFDrive )

Perkins, p.41.
10 The separation of Illyricum reflected moments when the security of the
important Danube border was under particular threat, but it was an unwieldy
administrative area as it was split between Latin-and Greek-speaking
communities, and in 395 it was to be permanently divided along the linguistic
boundary.
11 Garnsey and Humfress, Chapter Three, ‘Emperors and Bureaucrats’, provide
a succinct introduction to the administration. See also Christopher Kelly, and
Chapter Three, ‘The Limits of Empire’, of Heather. Specifically on law, see
Matthews, Laying Down the Law, Chapter Two, ‘Emperors, Laws and Jurists’;
Errington, Roman Imperial Policy from Julian to Theodosius; and Honoré.
12 There are reconstructions in Friell and Williams, and in Chapters Two and
Four of Heather.
13 Quoted in Heather, p.186.
14 Theodoret, Ecclesiastical History, Book 4:30. Available in the Select Library
of Nicene and Post-Nicene Fathers of the Christian Church, second series,
Volume Three, Oxford, 1892, or through the Internet.
15 Quoted in Friell and Williams, p.53. The original is found in the Theodosian
Code, 16:1, 2.
16 Sozomen, Ecclesiastical History, 7:4:5.
17 For this see Matthews, Western Aristocracies, especially Chapter IV, ‘The
Accession of Theodosius’, and Chapter VI, ‘Provincial Upper Classes:
Evangelism and Heresy’; and Sauer, especially, for the west, Chapters Five and
Six.