From 3ce65f73f07bf57805664558f3d5cc8258ff8701 Mon Sep 17 00:00:00 2001
From: Dehann Fourie <6412556+dehann@users.noreply.github.com>
Date: Mon, 11 Mar 2024 17:05:38 -0700
Subject: [PATCH] Update literature.md

---
 docs/src/refs/literature.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/src/refs/literature.md b/docs/src/refs/literature.md
index a0d1a197f..f374b4804 100644
--- a/docs/src/refs/literature.md
+++ b/docs/src/refs/literature.md
@@ -76,6 +76,8 @@ Newly created page to list related references and additional literature pertaini
 
 [2.17] Bishop, C.M., 2006. Pattern recognition and machine learning. New York: Springer. ISBN 978-0-387-31073-2.
 
+[2.18] Holmes, M.P., Gray, A.G. and Isbell Jr, C.L., 2010. [Fast kernel conditional density estimation: A dual-tree Monte Carlo approach.](https://faculty.cc.gatech.edu/~isbell/papers/COMSTA4589.pdf) Computational statistics & data analysis, 54(7), pp.1707-1718.
+
 ### Additional References
 
 [3.1]  Duits, Remco, Erik J. Bekkers, and Alexey Mashtakov. ["Fourier Transform on the Homogeneous Space of 3D Positions and Orientations for Exact Solutions to Linear Parabolic and (Hypo-) Elliptic PDEs".](https://www.preprints.org/manuscript/201811.0027/download/final_file) arXiv preprint arXiv:1811.00363 (2018).