diff --git a/book/src/resources.md b/book/src/resources.md
index 4045cfcf..7958c2b9 100644
--- a/book/src/resources.md
+++ b/book/src/resources.md
@@ -2,6 +2,8 @@
 
 Below is a list of links to resources we used while building Aiken.
 
-- Encoding/Decoding https://github.com/input-output-hk/plutus/blob/master/plutus-core/untyped-plutus-core/src/UntypedPlutusCore/Core/Instance/Flat.hs
-- Typing https://github.com/input-output-hk/plutus/blob/master/plutus-core/untyped-plutus-core/src/UntypedPlutusCore/Core/Type.hs
-- Serialization https://hydra.iohk.io/build/14133599/download/1/plutus-core-specification.pdf
+- [The Gleam's compiler](https://github.com/gleam-lang/gleam);
+- [The Official Plutus documentation](https://plutus.readthedocs.io/en/latest/);
+- [The source code about encoding/Decoding UPLC](https://github.com/input-output-hk/plutus/blob/9538fc9829426b2ecb0628d352e2d7af96ec8204/plutus-core/untyped-plutus-core/src/UntypedPlutusCore/Core/Instance/Flat.hs);
+- [The source code about core types](https://github.com/input-output-hk/plutus/blob/9538fc9829426b2ecb0628d352e2d7af96ec8204/plutus-core/untyped-plutus-core/src/UntypedPlutusCore/Core/Type.hs);
+- [The original (albeit outdated) Plutus Core specification](https://hydra.iohk.io/build/14133599/download/1/plutus-core-specification.pdf)