diff --git a/REFERENCES.bib b/REFERENCES.bib
index abc6307..ee0c23e 100644
--- a/REFERENCES.bib
+++ b/REFERENCES.bib
@@ -95,6 +95,16 @@ @report{iapws2018-1
   keywords = {Thermodynamic properties, Water, Water vapor}
 }
 
+@report{iapws2024-1,
+  title = {Revised Release on the Ionization Constant of H2O}
+  author = {IAPWS},
+  date = {2012},
+  number = {R11-24},
+  location = {Lucerne, Switzerland},
+  langid = {english},
+  keywords = {Thermodynamic properties,Water,Water vapor},
+}
+
 @article{10.1063/1.1928231,
     author = {Bandura, Andrei V. and Lvov, Serguei N.},
     title = {The Ionization Constant of Water over Wide Ranges of Temperature and Density},