diff --git a/ch14_applications.adoc b/ch14_applications.adoc
index ed5ff774..0d13307b 100644
--- a/ch14_applications.adoc
+++ b/ch14_applications.adoc
@@ -360,7 +360,7 @@ working on BIPs that may be available after this book goes((("Bitcoin", "as appl
 [[state_channels]]
 === Payment Channels and State Channels
 
-_Payment channels_ are a trustless mechanism for exchanging Bitcoin
+_Payment channels_ are ((("Bitcoin", "as application platform", "payment channels", secondary-sortas="application platform", id="bitcoin-app-platform-payment")))((("application platform, Bitcoin as", "payment channels", id="app-platform-payment")))((("payment channels", id="payment-channel")))a trustless mechanism for exchanging Bitcoin
 transactions between two parties, outside of the Bitcoin blockchain.
 These transactions, which would be valid if settled on the Bitcoin
 blockchain, are held offchain instead, waiting for
@@ -966,7 +966,7 @@ redeemed by _anyone_ who has the secret +R+. An HTLC can take many
 different forms with slight variations to the script. For example,
 adding a +CHECKSIG+ operator and a public key in the first clause
 restricts redemption of the hash to a particular recipient, who must also
-know the secret +R+.
+know the((("Bitcoin", "as application platform", "payment channels", secondary-sortas="application platform", startref="bitcoin-app-platform-payment")))((("application platform, Bitcoin as", "payment channels", startref="app-platform-payment")))((("payment channels", startref="payment-channel"))) secret +R+.
 
 [[lightning_network]]
 === Routed Payment Channels (Lightning Network)