diff --git a/chapter-hsms/chapter.tex b/chapter-hsms/chapter.tex
index 7bec249..1957044 100644
--- a/chapter-hsms/chapter.tex
+++ b/chapter-hsms/chapter.tex
@@ -246,7 +246,7 @@ server side -- HSM appliances -- are more stringent than one might expect since
 to adopt modern cryptography. Not only are modern cryptographic protocols like Secure Multiparty Computation (SMPC) or
 Zero-Knowledge Proofs (ZKPs) not commonly used. Even asymmetric cryptography has only been adopted reluctantly, and
 ancient ciphers such as Triple DES are still commonly referenced in industry
-standards~\cite{pci_security_standards_council_payment_2025}. As a result, increased hardware security is necessary to
+standards~\cite{pcisecuritystandardscouncilPaymentCardIndustry2025}. As a result, increased hardware security is necessary to
 safeguard weak symmetric keys, compensating for the systems' modest cryptographic security.
 
 Since card payment terminals are widely deployed, many different models from various manufacturers are available. Each
diff --git a/common-defs.tex b/common-defs.tex
index 066e697..df08ede 100644
--- a/common-defs.tex
+++ b/common-defs.tex
@@ -142,7 +142,9 @@
     \newrefcontext[labelprefix={W}]
     \printbibliography[type={online},title={Web sources},heading=subbibintoc]
     \newrefcontext
-    \printbibliography[nottype={online},resetnumbers,heading=subbibintoc]
+    \printbibliography[nottype={online},nottype={patent},resetnumbers,heading=subbibintoc]
+    \newrefcontext[labelprefix={P}]
+    \printbibliography[type={patent},title={Patent References},heading=subbibintoc]
 }
 
 \hyphenation{a-me-na-ble}