diff --git a/references.bib b/references.bib
index b10fcf7..4985398 100644
--- a/references.bib
+++ b/references.bib
@@ -32,6 +32,13 @@ @book{roys1933
   year           = {1933}
 }
 
+@book{beyer1937,
+  author         = {Beyer, Hermann},
+  publisher      = {Carnegie Institution of Washington},
+  title          = {Studies on the inscriptions of Chichen Itza},
+  year           = {1937}
+}
+
 @book{vonhagen1944,
   author         = {Von Hagen, Victor Wolfgang},
   title          = {The Aztec and Maya papermakers},
@@ -89,6 +96,17 @@ @inbook{kelley1962b
   doi            = {https://doi.org/10.2307/502055},
 }
 
+@inbook{kelley1962c,
+  author         = {Kelley, David H.},
+  chapter        = {Fonetismo en la escritura Maya},
+  pages          = {277-317},
+  volume         = {2},
+  publisher      = {Mexico: Universidad Nacional Aut\'{o}noma de M\'{e}xico},
+  journal        = {Estudios De Cultura Maya},
+  year           = {1962},
+  doi            = {https://doi.org/10.19130/iifl.ecm.1962.2.226},
+}
+
 @article{kelley1968,
   author          = {Kelley, David H.},
   journal         = {Estudios de Cultura Maya},
@@ -116,6 +134,16 @@ @book{knorozov1967
   series         = {Russian translation series of the Peabody Museum of Archaeology and Ethnology},
 }
 
+@inbook{jamesjusteson1984,
+  author         = {Fox, James A. and Justeson, John S.},
+  chapter        = {Appendix C: Conventions for the transliteration of Mayan Hieroglyphs},
+  editor         = {Justeson, John S. and Campbell L.},
+  pages          = {363-366},
+  publisher      = {Institute for Mesoamerican Studies Publication, State University of New York},
+  title          = {Phoneticism in Mayan Hieroglyphic },
+  year           = {1984}
+}
+
 @book{bricker1986,
   author         = {Bricker, Victoria Reifler},
   title          = {A Grammar of Mayan Hieroglyphs},