Recent and Previous Research on the Pericope Adulterae (John 7.53—8.11) Currents in Biblical Research 2008 6: 377-404. [Abstract] [PDF] [References]
Here's the abstract:
"This article surveys recent and previous research on the enigmatic Pericope Adulterae (PA), traditionally placed at Jn 7.53—8.11. The discussion is organized by the methodologies that scholars have applied to PA, and thus the article also demonstrates the various critical approaches in New Testament studies that have found popularity at a given time. While the following study will observe that some scholarly conclusions, such as the theory that PA did not appear in the original version of the Gospel of John, are near consensus, it will also highlight some remaining unsettled issues in PA scholarship."