diff --git a/codes/quantum/qubits/nonstabilizer/union_stabilizer/cws/ampdamp_cws.yml b/codes/quantum/qubits/nonstabilizer/union_stabilizer/cws/ampdamp_cws.yml
index 9af5ee44f..7e63d1a9c 100644
--- a/codes/quantum/qubits/nonstabilizer/union_stabilizer/cws/ampdamp_cws.yml
+++ b/codes/quantum/qubits/nonstabilizer/union_stabilizer/cws/ampdamp_cws.yml
@@ -21,6 +21,8 @@ relations:
   cousins:
     - code_id: constantin_rao
       detail: 'Amplitude-damping CWS codes can be obtained from CR codes \cite{arxiv:0907.5149}.'
+    - code_id: qubit_concatenated
+      detail: 'Concatenated versions of amplitude-damping CWS have been constructed \cite{arxiv:0710.1052,arxiv:2412.16450}.'
 
 
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