1 files changed, 14 insertions, 0 deletions
diff --git a/doc/codec2_refs.bib b/doc/codec2_refs.bib
index 9999286..756a92b 100644
--- a/doc/codec2_refs.bib
+++ b/doc/codec2_refs.bib
@@ -68,3 +68,17 @@
   year = {2023}, 
   note = {\url{https://github.com/drowe67/misc/blob/master/ratek_resampler/ratek_resampler.pdf}}
 }
+
+@book{kondoz1994digital,
+  title={Digital speech: coding for low bit rate communication systems},
+  author={Kondoz, Ahmet M},
+  year={1994},
+  publisher={John Wiley \& Sons}
+}
+
+@book{kleijn1995speech,
+  title={Speech coding and synthesis},
+  author={Kleijn, W Bastiaan and Paliwal, Kuldip K},
+  year={1995},
+  publisher={Elsevier Science Inc.}
+}
+\ No newline at end of file