A tale of two approaches: Ambrose, 'De Officiis' (I.1-22) and Cicero, 'De Officiis' (I.1-6) (Speculations on a homiletic provenance of a Christian composition on classical expository commentary)
Ij. Davidson, A tale of two approaches: Ambrose, 'De Officiis' (I.1-22) and Cicero, 'De Officiis' (I.1-6) (Speculations on a homiletic provenance of a Christian composition on classical expository commentary), J THEOL ST, 52, 2001, pp. 61-83