From: Marc Fehling <mafehling.git@gmail.com>
Date: Tue, 24 May 2022 17:51:52 +0000 (-0600)
Subject: Fix doxygen entry Chronopoulos1989.
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Fix doxygen entry Chronopoulos1989.
---

diff --git a/doc/doxygen/references.bib b/doc/doxygen/references.bib
index afa41bf28a..6f97c4e370 100644
--- a/doc/doxygen/references.bib
+++ b/doc/doxygen/references.bib
@@ -1778,7 +1778,6 @@ url = {https://doi.org/10.1016/0045-7930(73)90027-3}
   url = {http://doi.org/10.1007/s10915-011-9549-4}
 }
 
-
 @PhDThesis{Richter2005,
   author = {T. Richter},
   title  = {Parallel Multigrid Method for Adaptive Finite Elements with Application to 3D Flow Problems},
@@ -1789,13 +1788,12 @@ url = {https://doi.org/10.1016/0045-7930(73)90027-3}
 }
 
 @article{Chronopoulos1989,
-  author = {Chronopoulos, A. T. and Gear, C. W.},
+  author = {A. T. Chronopoulos and C. W. Gear},
   title = {S-step Iterative Methods for Symmetric Linear Systems},
   journal = {Journal of Computational and Applied Mathematics},
   volume = {25},
   number = {2},
   year = {1989},
   pages = {153--168},
-  doi = {10.1016/0377-0427(89)90045-9},
   url = {https://doi.org/10.1016/0377-0427(89)90045-9}
 }