diff --git a/dmc-lib/src/ir/register_allocation.rs b/dmc-lib/src/ir/register_allocation.rs
index 627de51..6386a49 100644
--- a/dmc-lib/src/ir/register_allocation.rs
+++ b/dmc-lib/src/ir/register_allocation.rs
@@ -1,3 +1,5 @@
+/// Used this video as source for algorithms in this module:
+/// https://www.youtube.com/watch?v=eWp_-XCwN1A
 use crate::ir::ir_block::IrBlock;
 use crate::ir::ir_variable::IrVariableId;
 use crate::ir::variable_locations::VariableLocations;