Update bib for the paper

joss/paper.bib

@@ -3,6 +3,18 @@ Any changes to this file will be lost if it is regenerated by Mendeley.
 
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+@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}},