Aufrecht 1989:"The discovery of the Amman Theatre Inscription, Amman Citadel Inscription, Tell Siren Bottle, Heshbon Ostraca, and Tell el-Mazer Ostraca has opened a new chapter in the study of ancient Northwest Semitic inscriptions: the recognition and analysis of the language and script of ancient Ammon. These new discoveries, in turn, have prompted a reclassification of a number of epigraphic materials previously identified as Hebrew, Phoenician, or Aramaic." Aufrecht, WE. A Corpus of Ammonite Inscriptions. Lewiston: E. Mellen Press. 1989. ISBN 0-88946-089-2.
glottolog.org
Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian (编). Ammonite. Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History. 2016.