- Greenlee, J. Harold (2005): "More than these?" John 21:15, in: JOT 2/05. S. 19-20.
- Abstract: In John 21:15 Jesus asks Peter, “Do you love me more than these?” Who or what are “these”? This brief article deals with the three possible referents and recommends one as correct.
- Shepherd, David (2010): "Do you love me?" A narrative-critical reappraisal of ἀγαπάω and φιλέω in John 21:15-17, in: JBL 4/2010, S. 777-792.