diff --git a/_bibliography/pint.bib b/_bibliography/pint.bib
index ee08b836..06947508 100644
--- a/_bibliography/pint.bib
+++ b/_bibliography/pint.bib
@@ -6787,6 +6787,36 @@ @article{Wang2023
 	year = {2023},
 }
 
+@article{WangEtAl2023,
+	author = {Wang, Meijuan and Zhang, Shugong},
+	doi = {10.3390/sym15122144},
+	issn = {2073-8994},
+	journal = {Symmetry},
+	month = {December},
+	number = {12},
+	pages = {2144},
+	publisher = {MDPI AG},
+	title = {A Preconditioner for Galerkin–Legendre Spectral All-at-Once System from Time-Space Fractional Diffusion Equation},
+	url = {http://dx.doi.org/10.3390/sym15122144},
+	volume = {15},
+	year = {2023},
+}
+
+@article{WuEtAl2023,
+	author = {Wu, Shu-Lin and Wang, Zhiyong and Zhou, Tao},
+	doi = {10.1137/22m1516476},
+	issn = {1095-7162},
+	journal = {SIAM Journal on Matrix Analysis and Applications},
+	month = {November},
+	number = {4},
+	pages = {1771–1798},
+	publisher = {Society for Industrial & Applied Mathematics (SIAM)},
+	title = {PinT Preconditioner for Forward-Backward Evolutionary Equations},
+	url = {http://dx.doi.org/10.1137/22M1516476},
+	volume = {44},
+	year = {2023},
+}
+
 @article{YamazakiEtAl2023,
 	author = {Hiroe Yamazaki and Colin J. Cotter and Beth A. Wingate},
 	doi = {10.1002/qj.4517},