From 9584af505258b502c6d3e78793e82684dcf52d31 Mon Sep 17 00:00:00 2001
From: Umberto Zerbinati <umberto.zerbinati@maths.ox.ac.uk>
Date: Thu, 12 Dec 2024 14:00:29 +0000
Subject: [PATCH] Some references (#3924)

Signed-off-by: Umberto Zerbinati <zerbinati@maths.ox.ac.uk>
Co-authored-by: Umberto Zerbinati <zerbinati@maths.ox.ac.uk>
---
 AUTHORS.rst                     |  2 ++
 firedrake/mesh.py               |  2 ++
 firedrake_citations/__init__.py | 16 ++++++++++++++++
 3 files changed, 20 insertions(+)

diff --git a/AUTHORS.rst b/AUTHORS.rst
index 80c7f1bde3..cb83a641ab 100644
--- a/AUTHORS.rst
+++ b/AUTHORS.rst
@@ -172,5 +172,7 @@ Florian Wechsung..............<https://florianwechsung.github.io>
 
 Yian Zeng
 
+Umberto Zerbinati.............<https://www.uzerbinati.eu>
+
 Fangyi Zhou
 
diff --git a/firedrake/mesh.py b/firedrake/mesh.py
index 2c0ef9e198..bef4d38bf3 100644
--- a/firedrake/mesh.py
+++ b/firedrake/mesh.py
@@ -3061,6 +3061,8 @@ def Mesh(meshfile, **kwargs):
             from ngsPETSc import FiredrakeMesh
         except ImportError:
             raise ImportError("Unable to import ngsPETSc. Please ensure that ngsolve is installed and available to Firedrake.")
+        from firedrake_citations import Citations
+        Citations().register("Betteridge2024")
         netgen_flags = kwargs.get("netgen_flags", {"quad": False, "transform": None, "purify_to_tets": False})
         netgen_firedrake_mesh = FiredrakeMesh(meshfile, netgen_flags, user_comm)
         plex = netgen_firedrake_mesh.meshMap.petscPlex
diff --git a/firedrake_citations/__init__.py b/firedrake_citations/__init__.py
index 2af731b5ce..46e6a0a77a 100644
--- a/firedrake_citations/__init__.py
+++ b/firedrake_citations/__init__.py
@@ -359,3 +359,19 @@ def print_at_exit(cls):
   year = {2024}
 }
 """)
+
+Citations().add("Betteridge2024", """
+@article{Betteridge2024,
+  doi = {10.21105/joss.07359},
+  url = {https://doi.org/10.21105/joss.07359},
+  year = {2024},
+  publisher = {The Open Journal},
+  volume = {9},
+  number = {104},
+  pages = {7359},
+  author = {Jack Betteridge and Patrick E. Farrell and Matthias Hochsteger
+            and Christopher Lackner and Joachim Schöberl and Stefano Zampini
+            and Umberto Zerbinati},
+  title = {ngsPETSc: A coupling between NETGEN/NGSolve and PETSc},
+  journal = {Journal of Open Source Software} }
+""")