Edited ch03_bitcoin-core.adoc with Atlas code editor

ch03_bitcoin-core.adoc

@@ -1120,7 +1120,7 @@ block is 10,322.07722534 BTC (including 25 BTC reward and 0.0909 BTC in
 fees). Compare that to the amount reported by a block explorer site by
 searching for the block hash or height. Some block explorers report the
 total value excluding the reward and excluding the fees. See if you can
-spot the difference.
+spot the ((("Bitcoin Core", "command-line interface", "API access", startref="bitcoin-core-command-api")))((("command-line interface (Bitcoin Core)", "API access", startref="command-api")))((("API access", startref="api")))difference.
 
 [[alt_libraries]]
 === Alternative Clients, Libraries, and Toolkits