diff --git a/cif_mag.dic b/cif_mag.dic
index 8b3f4d9..c490947 100644
--- a/cif_mag.dic
+++ b/cif_mag.dic
@@ -2656,6 +2656,8 @@ save_space_group_magn.name_bns
     Ref: 'Magnetic Group Tables' by D.B. Litvin at
     http://www.iucr.org/publ/978-0-9553602-2-0.
     Campbell et al., Acta Cryst. A78, 99–106 (2022).
+    https://doi.org/10.1107/S2053273321012912
+    https://www.iucr.org/paper?ib5106
     ISO-MAG tables of H.T. Stokes and B.J. Campbell at http://iso.byu.edu.
 ;
     _name.category_id             space_group_magn