diff --git a/README.md b/README.md
index 77cc596..5e28f16 100644
--- a/README.md
+++ b/README.md
@@ -81,8 +81,9 @@
 
 <br>
 
-* [ERC-20](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol)
-* [ERC-721](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/ERC721.sol)
+* [OpenZeppelin's ERC-20](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol)
+* [OpenZeppelin's ERC-721](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/ERC721.sol)
+* [Immunefi notes on the ERC token standard](https://medium.com/immunefi/how-erc-standards-work-part-1-c9795803f459)
 * [Security contracts from OpenZeppelin](https://github.com/OpenZeppelin/openzeppelin-contracts/tree/master/contracts/security)
 * [Uniswap v3](https://github.com/Uniswap/v3-core/tree/main/contracts)
 * [Fei protocol](https://github.com/fei-protocol/fei-protocol-core/tree/master/contracts)