diff --git a/joss/paper.bib b/joss/paper.bib
index 02d461ad90053bf051348501c40db794b1342161..877349e8bce181c44836f2db3ac0479f38fa870c 100644
--- a/joss/paper.bib
+++ b/joss/paper.bib
@@ -3,6 +3,18 @@ Any changes to this file will be lost if it is regenerated by Mendeley.
 
 BibTeX export options can be customized via Options -> BibTeX in Mendeley Desktop
 
+@misc{Xu,
+author = {Xu, Chuanqi},
+title = {{chuanqixu/SISSOkit: Modules for cross validation, evaluation and plot of SISSO}},
+url = {https://github.com/chuanqixu/SISSOkit},
+urldate = {2021-09-15}
+}
+@misc{Waroquiers,
+author = {Waroquiers, David},
+title = {{Matgenix/pysisso: Python interface to the SISSO (Sure Independence Screening and Sparsifying Operator) method.}},
+url = {https://github.com/Matgenix/pysisso},
+urldate = {2021-09-15}
+}
 @misc{Ouyang,
 author = {Ouyang, Runhai},
 title = {{GitHub - rouyang2017/SISSO: A data-driven method combining symbolic regression and compressed sensing toward accurate {\&} interpretable models}},