diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index e86256c29..e8db4268c 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -1766,10 +1766,10 @@ This section is divided into Normative and Informative references.  Normative re
 ## Normative
 
 ## Informative
-<a id="ref-casper-ffg"></a> _**casper-ffg**_
+<a id="ref-casper-ffg"></a> _**casper-ffg**_  
  &nbsp; _Casper the Friendly Finality Gadget_. V. Buterin and V. Griffith. URL: https://arxiv.org/abs/1710.09437
 
-<a id="ref-python-poc"></a> _**python-poc**_
+<a id="ref-python-poc"></a> _**python-poc**_  
  &nbsp; _Python proof-of-concept implementation_. Ethereum Foundation. URL: https://github.com/ethereum/beacon_chain
 
 # Copyright