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codes/classical/bits/cyclic/self_dual_48_24_12.yml

@@ -21,9 +21,11 @@ relations:
       detail: 'The \([48,24,12]\) self-dual code is the only self-dual doubly-even code at its parameters \cite{doi:10.1109/TIT.2002.806146}.'
     - code_id: divisible
       detail: 'The \([48,24,12]\) self-dual code is the only self-dual doubly-even code at its parameters \cite{doi:10.1109/TIT.2002.806146}.'
-  cousins:
     - code_id: combinatorial_design
       detail: 'Fixed-weight codewords of extremal self-dual doubly-even codes whose length divides 24 form a combinatorial 5-design \cite{doi:10.1016/S0021-9800(69)80115-8}.'
+  cousins:
+    - code_id: group_algebra
+      detail: 'The \([48,24,12]\) self-dual code is a group code for \(G\) being a dihedral group \cite{doi:10.1007/s10623-011-9530-0}\cite[Exam. 16.5.1]{preset:HPRainsSloane}.'
 
 
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