Columbia subject headings:
Liberty.
Origen--Criticism and interpretation.
Origen--Influence.
Harvard subject headings:
Free will and determinism--Congresses
Liberty--Philosophy--Congresses.
Liberty--Religious aspects--Christianity--Congresses.
Origen--Influence--Congresses.
Philosophy, Modern--Congresses
Princeton subject headings:
Conference papers and proceedings.
Free will and determinism--Congresses.
Idealism, German--Congresses.
Liberty--Philosophy--Congresses.
Liberty--Religious aspects--Christianity--Congresses.
Origen--Influence--Congresses.
Universität Münster. Forschungsstelle Origenes