diff --git a/quox.bib b/quox.bib
index a6d2903..5e99ea7 100644
--- a/quox.bib
+++ b/quox.bib
@@ -253,6 +253,25 @@
   date = {2023},
 }
 
+@inproceedings{multimodal,
+  author       = {Daniel Gratzer and
+                  G. A. Kavvos and
+                  Andreas Nuyts and
+                  Lars Birkedal},
+  editor       = {Holger Hermanns and
+                  Lijun Zhang and
+                  Naoki Kobayashi and
+                  Dale Miller},
+  title        = {Multimodal Dependent Type Theory},
+  booktitle    = {{LICS} '20: 35th Annual {ACM/IEEE} Symposium on Logic in Computer
+                  Science, Saarbr{\"{u}}cken, Germany, July 8-11, 2020},
+  pages        = {492--506},
+  publisher    = {{ACM}},
+  year         = {2020},
+  url          = {https://doi.org/10.1145/3373718.3394736},
+  doi          = {10.1145/3373718.3394736},
+}
+
 
 % Misc implementation