From d6e9363f52fa8199ce3fe2c0831cdf04f35a59ff Mon Sep 17 00:00:00 2001
From: Bas Nijholt <basnijholt@gmail.com>
Date: Tue, 10 Sep 2019 12:59:33 +0200
Subject: [PATCH] add Visvalingam ref

---
 paper.bib | 11 +++++++++++
 paper.md  |  1 +
 2 files changed, 12 insertions(+)

diff --git a/paper.bib b/paper.bib
index 72f0fc2..a7073d9 100755
--- a/paper.bib
+++ b/paper.bib
@@ -91,3 +91,14 @@
   url = {http://demonstrations.wolfram.com/AdaptivePlotting/},
   urldate = {2019-09-10}
 }
+
+@inproceedings{visvalingam1990douglas,
+  title={The Douglas-Peucker Algorithm for Line Simplification: Re-evaluation through Visualization},
+  author={Visvalingam, Mahes and Whyatt, J Duncan},
+  booktitle={Computer Graphics Forum},
+  volume={9},
+  number={3},
+  pages={213--225},
+  year={1990},
+  organization={Wiley Online Library}
+}
diff --git a/paper.md b/paper.md
index 3926860..2f8dd90 100755
--- a/paper.md
+++ b/paper.md
@@ -95,6 +95,7 @@ It easily integrates with the Jupyter notebook environment and provides tools fo
 ## Line simplification loss
 
 #### The line simplification loss is based on an inverse Visvalingam’s algorithm.
+Inspired by a method commonly employed in digital cartography for coast line simplification, we construct a loss function that does its reverse. [@visvalingam1990douglas]
 <!-- https://bost.ocks.org/mike/simplify/ -->
 
 ## A parallelizable adaptive integration algorithm based on cquad
-- 
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