diff --git a/codes/classical_into_quantum/classical_into_quantum.yml b/codes/classical_into_quantum/classical_into_quantum.yml
index db71c716f..33a947cbc 100644
--- a/codes/classical_into_quantum/classical_into_quantum.yml
+++ b/codes/classical_into_quantum/classical_into_quantum.yml
@@ -28,6 +28,11 @@ features:
 
     Ideal decoding error scales is suppressed exponentially with the number of subsystems \(n\) (for c-q block codes), and the exponent has been studied in Ref. \cite{arxiv:2310.09014}.
 
+    Unambiguous state discrimination (USD) can be used to achieve Holevo capacity on a general pure-state c-q channel \cite{doi:10.1109/ISIT.2013.6620209}.
+
+  decoders:
+    - 'Unambiguous state discrimination (USD) \cite{doi:10.1109/ISIT.2013.6620209}.'
+
 relations:
   parents:
     - code_id: oaecc
diff --git a/codes/classical_into_quantum/concatenated_c-q.yml b/codes/classical_into_quantum/concatenated_c-q.yml
index 98517dbff..4745eac53 100644
--- a/codes/classical_into_quantum/concatenated_c-q.yml
+++ b/codes/classical_into_quantum/concatenated_c-q.yml
@@ -9,6 +9,8 @@ name: 'Concatenated c-q code'
 
 description: 'A c-q code constructed out of two classical or quantum codes for the purposes of transmission of classical information over quantum channels.'
 
+features:
+  rate: 'Concatenated codes can achieve Holevo capacity \cite{arxiv:1102.1963}.'
 
 relations:
   parents:
diff --git a/codes/quantum/oscillators/stabilizer/lattice/gkp.yml b/codes/quantum/oscillators/stabilizer/lattice/gkp.yml
index bc3a5af5f..67199af91 100644
--- a/codes/quantum/oscillators/stabilizer/lattice/gkp.yml
+++ b/codes/quantum/oscillators/stabilizer/lattice/gkp.yml
@@ -33,6 +33,7 @@ features:
     - 'Two Josephson junctions coupled by a gyrator \cite{arxiv:2002.07718}.'
     - 'Periodic driving (a.k.a. Floquet engineering) \cite{arxiv:2303.03541}.'
     - 'Approximate GKP states can be prepared using Gaussian operations and photon detectors \cite{arxiv:1902.02323}.'
+    - 'An optimal-size circuit using ancillary qubits can be used to prepare an approximate GKP state \cite{arxiv:2410.19610}. The size of the circuit is linear in the logarithm of the approximation parameters of the GKP codes.'
   general_gates:
     - 'By applying square-lattice GKP error correction to Gaussian input states, universality can be achieved without non-Gaussian elements \cite{arxiv:1903.00012}.'