diff --git a/optim.bib b/optim.bib
index a1fc415..eead499 100644
--- a/optim.bib
+++ b/optim.bib
@@ -857,7 +857,7 @@ @inproceedings{Conn_Scheinberg_Toint_1998
 }
 
 @article{Conn_Scheinberg_Vicente_2008a,
-    author       = {Conn, A. R. and Scheinberg, K. and N. Vicente, L.},
+    author       = {Conn, A. R. and Scheinberg, K. and Vicente, L. N.},
     title        = {Geometry of interpolation sets in derivative free optimization},
     journaltitle = j-mp,
     volume       = {111},
@@ -869,7 +869,7 @@ @article{Conn_Scheinberg_Vicente_2008a
 }
 
 @article{Conn_Scheinberg_Vicente_2008b,
-    author       = {Conn, A. R. and Scheinberg, K. and N. Vicente, L.},
+    author       = {Conn, A. R. and Scheinberg, K. and Vicente, L. N.},
     title        = {Geometry of sample sets in derivative-free optimization: polynomial regression and underdetermined interpolation},
     journaltitle = j-ima-jna,
     volume       = {28},
@@ -881,7 +881,7 @@ @article{Conn_Scheinberg_Vicente_2008b
 }
 
 @article{Conn_Scheinberg_Vicente_2009a,
-    author       = {Conn, A. R. and Scheinberg, K. and N. Vicente, L.},
+    author       = {Conn, A. R. and Scheinberg, K. and Vicente, L. N.},
     title        = {Global convergence of general derivative-free trust-region algorithms to first- and second-order critical points},
     journaltitle = j-siopt,
     volume       = {20},
@@ -893,7 +893,7 @@ @article{Conn_Scheinberg_Vicente_2009a
 }
 
 @book{Conn_Scheinberg_Vicente_2009b,
-    author    = {Conn, A. R. and Scheinberg, K. and N. Vicente, L.},
+    author    = {Conn, A. R. and Scheinberg, K. and Vicente, L. N.},
     title     = {Introduction to Derivative-Free Optimization},
     series    = s-mpso,
     publisher = pub-siam,
@@ -3502,6 +3502,17 @@ @article{Wright_2012
     _updated     = {2022-04-29},
 }
 
+@online{Xie_Yuan_2023,
+    author       = {Xie, P. and Yuan, Y.},
+    title        = {Least ${H^2}$ norm updating quadratic interpolation model function for derivative-free trust-region algorithms},
+    date         = {2023},
+    eprint       = {2302.12017},
+    eprinttype   = {arxiv},
+    eprintclass  = {math.OC},
+    _created     = {2023-02-27},
+    _updated     = {2023-02-27},
+}
+
 @article{Yamakawa_Fukushima_Ibaraki_1989,
     author       = {Yamakawa, E. and Fukushima, M. and Ibaraki, T.},
     title        = {An efficient trust region algorithm for minimizing nondifferentiable composite functions},
@@ -3595,6 +3606,18 @@ @thesis{Zhang_2012
     _updated    = {2022-12-07},
 }
 
+@article{Zhang_2014,
+    author       = {Zhang, Z.},
+    title        = {Sobolev seminorm of quadratic functions with applications to derivative-free optimization},
+    journaltitle = j-mp,
+    volume       = {146},
+    _number      = {1--1},
+    pages        = {77--96},
+    date         = {2014},
+    _created     = {2023-02-27},
+    _updated     = {2023-02-27},
+}
+
 @article{Zhang_Conn_Scheinberg_2010,
     author       = {Zhang, H. and Conn, A. R. and Scheinberg, K.},
     title        = {A derivative-free algorithm for least-squares minimization},