Add Software Impacts reference

README.md

@@ -32,18 +32,36 @@ implementation. Lobachevskii Journal of Mathematics, 40(5):535–546, May 2019.
 
 ```bib
 @Article{Demidov2019,
-    author="Demidov, D.",
-    title="AMGCL: An Efficient, Flexible, and Extensible Algebraic Multigrid Implementation",
-    journal="Lobachevskii Journal of Mathematics",
-    year="2019",
-    month="May",
-    day="01",
-    volume="40",
-    number="5",
-    pages="535--546",
-    issn="1818-9962",
-    doi="10.1134/S1995080219050056",
-    url="https://doi.org/10.1134/S1995080219050056"
+    author = "Demidov, D.",
+    title = "AMGCL: An Efficient, Flexible, and Extensible Algebraic Multigrid Implementation",
+    journal = "Lobachevskii Journal of Mathematics",
+    year = "2019",
+    month = "May",
+    day = "01",
+    volume = "40",
+    number = "5",
+    pages = "535--546",
+    issn = "1818-9962",
+    doi = "10.1134/S1995080219050056",
+    url = "https://doi.org/10.1134/S1995080219050056"
+}
+```
+
+D. Demidov. AMGCL -- A C++ library for efficient solution of large sparse linear
+systems.  Software Impacts, 6:100037, November 2020.
+[doi](https://doi.org/10.1016/j.simpa.2020.100037)
+
+```bib
+@article{Demidov2020,
+    author = "Denis Demidov",
+    title = "AMGCL -- A C++ library for efficient solution of large sparse linear systems",
+    journal = "Software Impacts",
+    volume = "6",
+    pages = "100037",
+    year = "2020",
+    issn = "2665-9638",
+    doi = "10.1016/j.simpa.2020.100037",
+    url = "https://doi.org/10.1016/j.simpa.2020.100037"
 }
 ```
 

docs/index.rst

@@ -25,10 +25,10 @@ Referencing
 
 D. Demidov. AMGCL: An efficient, flexible, and extensible algebraic multigrid
 implementation. Lobachevskii Journal of Mathematics, 40(5):535–546, May 2019.
-doi_ pdf_
+doi1_ pdf1_
 
-.. _doi: https://doi.org/10.1134/S1995080219050056
-.. _pdf: https://rdcu.be/bHFsY
+.. _doi1: https://doi.org/10.1134/S1995080219050056
+.. _pdf1: https://rdcu.be/bHFsY
 
 .. code:: bibtex
 
@@ -47,6 +47,26 @@ doi_ pdf_
         url="https://doi.org/10.1134/S1995080219050056"
     }
 
+D. Demidov. AMGCL -- A C++ library for efficient solution of large sparse linear
+systems.  Software Impacts, 6:100037, November 2020.
+doi2_
+
+.. _doi2: https://doi.org/10.1016/j.simpa.2020.100037
+
+.. code:: bibtex
+
+    @article{Demidov2020,
+        author = "Denis Demidov",
+        title = "AMGCL -- A C++ library for efficient solution of large sparse linear systems",
+        journal = "Software Impacts",
+        volume = "6",
+        pages = "100037",
+        year = "2020",
+        issn = "2665-9638",
+        doi = "10.1016/j.simpa.2020.100037",
+        url = "https://doi.org/10.1016/j.simpa.2020.100037"
+    }
+
 Contents:
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