diff --git a/russell_lab/README.md b/russell_lab/README.md
index 8749c0f4..efa6c3fd 100644
--- a/russell_lab/README.md
+++ b/russell_lab/README.md
@@ -11,6 +11,7 @@ _This crate is part of [Russell - Rust Scientific Library](https://github.com/cp
 
 - [Introduction](#introduction)
   - [Documentation](#documentation)
+  - [External crates](#external-crates)
 - [Installation](#installation)
   - [Setting Cargo.toml up](#setting-cargotoml-up)
   - [Optional features](#optional-features)
@@ -74,6 +75,12 @@ There are many functions for linear algebra, such as (for Real and Complex types
 
 * [![documentation](https://docs.rs/russell_lab/badge.svg)](https://docs.rs/russell_lab/) — [russell_lab documentation](https://docs.rs/russell_lab/)
 
+### External crates
+
+A few other third-party crates related to numerical mathematics and associated disciplines are listed below:
+
+* [lambert_w](https://github.com/JSorngard/lambert_w) — Computes the [Lambert W function](https://mathworld.wolfram.com/LambertW-Function.html)
+
 
 
 ## Installation
diff --git a/russell_lab/src/lib.rs b/russell_lab/src/lib.rs
index 7177224b..94190add 100644
--- a/russell_lab/src/lib.rs
+++ b/russell_lab/src/lib.rs
@@ -20,6 +20,10 @@
 //! * [matvec] -- Functions operating on matrices and vectors
 //! * [vector] -- Vector struct and associated functions
 //!
+//! Other functionality may be found in external crates, for instance:
+//!
+//! * [lambert_w](https://github.com/JSorngard/lambert_w) -- Computes the [Lambert W function](https://mathworld.wolfram.com/LambertW-Function.html)
+//!
 //! ## Linear algebra
 //!
 //! For linear algebra, the main structures are [NumVector] and [NumMatrix], that are generic Vector and Matrix structures. The Matrix data is stored as **column-major**. The [Vector] and [Matrix] are `f64` and `Complex64` aliases of `NumVector` and `NumMatrix`, respectively.