s gradual replacement by the codex see William A. Johnson, "The Ancient Book", in _The Oxford Handbook of Papyrology_ , ed. Roger S. Bagnall, Oxford, 2009, pp 256-281, 6(http://google.com/books?id=6GRcLuc124oC&pg=PA256).
Addendum (June 9)
Arie Altena wrote a [report from the
ii/) published on the website of Digital Publishing Toolkit initiative,
followed by another [summary of the