W.J. Elliott & D.C. Parker, The New Testament in Greek, 4, Gospel according to St. John; Vol. 1, Papyri, Leiden: E.J. Brill 1995.
Andreas Schmidt, 'Zwei Anmerkungen zu P. Ryl. III 457,' Archiv für Papyrusforschung und verwandte Gebiete, 35, 1989, pp. 11-12.
C. H. Roberts, Catalogue of Greek and Latin Papyri in the John Rylands Library Vol. III Theological and Literary Texts (Nos. 457-551), Manchester: Sherratt and Hughes, 1938.
C.H. Roberts, 'An unpublished fragment of the Fourth Gospel in the John Rylands Library,' Bulletin of the John Rylands Library, 1936; Vol. 20 (1), p. 45-55.

The Fragment of the Gospel of John in the context of Early Christian writing

Roger S. Bagnall, Early Christian Books in Egypt, Princeton, N.J.: Princeton University Press 2009.
Brent Nongbri, 'The Use and Abuse of P52: Papyrological Pitfalls in the Dating of the Fourth Gospel,' Harvard Theological Review, 2005; Vol. 98, p. 23-52.
L.W. Hurtado, 'Π52 (P. Rylands Gk. 457) and the Nomina Sacra: Method and Probability,' Tyndale Bulletin, 2003; Vol. 54 (1).
Charles E. Hill, 'Did the Scribe of P52 use the Nomina Sacra? Another Look,' New Testament Studies, 2002, Vol. 48.
Christopher M. Tuckett, 'P⁵² and Nomina Sacra,' New Testament Studies, 2001; Vol. 47.

The John Rylands Library Collections

Summary description of Greek Papyri in the Guide to Special Collections, available online at: http://www.library.manchester.ac.uk/search-resources/special-collections/guide-to-special-collections/atoz/greek-manuscripts/
J.K. Elliott, 'The Biblical manuscripts of the John Rylands University Library of Manchester', Bulletin of the John Rylands University Library of Manchester, 1999; Vol. 81 (2), p. 3-50.