diff --git a/src/interpolation.rs b/src/interpolation.rs
index 54f97d0..85f5860 100644
--- a/src/interpolation.rs
+++ b/src/interpolation.rs
@@ -1,17 +1,23 @@
+//! Available interpolation modes.
+
 #[cfg(feature = "serialization")] use serde_derive::{Deserialize, Serialize};
 
-/// Interpolation mode.
+/// Available kind of interpolations.
+///
+/// Feel free to visit each variant for more documentation.
 #[derive(Copy, Clone, Debug)]
 #[cfg_attr(feature = "serialization", derive(Deserialize, Serialize))]
 #[cfg_attr(feature = "serialization", serde(rename_all = "snake_case"))]
 pub enum Interpolation<T> {
-  /// Hold a [`Key`] until the interpolator value passes the normalized step threshold, in which
+  /// Hold a [`Key<T, _>`] until the sampling value passes the normalized step threshold, in which
   /// case the next key is used.
   ///
   /// > Note: if you set the threshold to `0.5`, the first key will be used until half the time
   /// > between the two keys; the second key will be in used afterwards. If you set it to `1.0`, the
   /// > first key will be kept until the next key. Set it to `0.` and the first key will never be
   /// > used.
+  ///
+  /// [`Key<T, _>`]: crate::key::Key
   Step(T),
   /// Linear interpolation between a key and the next one.
   Linear,
@@ -22,7 +28,7 @@ pub enum Interpolation<T> {
 }
 
 impl<T> Default for Interpolation<T> {
-  /// `Interpolation::Linear` is the default.
+  /// [`Interpolation::Linear`] is the default.
   fn default() -> Self {
     Interpolation::Linear
   }
diff --git a/src/iter.rs b/src/iter.rs
index 85c7b3d..a342194 100644
--- a/src/iter.rs
+++ b/src/iter.rs
@@ -1,10 +1,18 @@
+//! Spline [`Iterator`], in a nutshell.
+//!
+//! You can iterate over a [`Spline<K, V>`]’s keys with the [`IntoIterator`] trait on
+//! `&Spline<K, V>`. This gives you iterated [`Key<K, V>`] keys.
+//!
+//! [`Spline<K, V>`]: crate::spline::Spline
+//! [`Key<K, V>`]: crate::key::Key
+
 use crate::{Key, Spline};
 
 /// Iterator over spline keys.
 ///
-/// This iterator type assures you to iterate over sorted keys.
+/// This iterator type is guaranteed to iterate over sorted keys.
 pub struct Iter<'a, T, V> where T: 'a, V: 'a {
-  anim_param: &'a Spline<T, V>,
+  spline: &'a Spline<T, V>,
   i: usize
 }
 
@@ -12,7 +20,7 @@ impl<'a, T, V> Iterator for Iter<'a, T, V> {
   type Item = &'a Key<T, V>;
 
   fn next(&mut self) -> Option<Self::Item> {
-    let r = self.anim_param.0.get(self.i);
+    let r = self.spline.0.get(self.i);
 
     if let Some(_) = r {
       self.i += 1;
@@ -28,7 +36,7 @@ impl<'a, T, V> IntoIterator for &'a Spline<T, V> {
 
   fn into_iter(self) -> Self::IntoIter {
     Iter {
-      anim_param: self,
+      spline: self,
       i: 0
     }
   }