McNamee, K., Abbreviations in Greek Literary Papyri and Ostraca,
BASP Suppl. 3, Chicago 1981
--, Sigla and Select Marginalia in Greek Literary Papyri, Pap.Brux.
26, 1992
--, Annotations in Greek and Latin Texts from Egypt. A.Stud.Pap. 45 (New Haven 2007)
Paap, A. H. R. E., Nomina Sacra in the Greek Papyri of the First
Five Centuries, Pap.Lugd.-Bat. 8, Leiden 1959
There is no detailed modern study on the abbreviations used in the documentary
papyri. Lists of some of the most commonly used abbreviations can be found
at the end of Montevecchi's, La Papirologia, and in the indexes
of P.Lond. as well as in A.Blanchard, Sigles et abreviations
dans les papyrus documentaires grecs, BICS Suppl. 30, 1974.