diff --git a/latex/thesis/bibliography.bib b/latex/thesis/bibliography.bib
index e82bba0..44cee94 100644
--- a/latex/thesis/bibliography.bib
+++ b/latex/thesis/bibliography.bib
@@ -210,3 +210,13 @@
     url={https://d1.amobbs.com/bbs_upload782111/files_35/ourdev_604508GHLFR2.pdf}
 }
 
+@ARTICLE{gallager_ldpc,
+  author={Gallager, R.},
+  journal={IRE Transactions on Information Theory}, 
+  title={Low-density parity-check codes}, 
+  year={1962},
+  volume={8},
+  number={1},
+  pages={21-28},
+  doi={10.1109/TIT.1962.1057683}
+}