Merge pull request #22 from jverzani/issue_21

update link for tupper to use DOI; close #21
jverzani · Sep 4, 2019 · 8548e7c · 8548e7c
2 parents 70693fa + ff295a9
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diff --git a/README.md b/README.md
@@ -5,7 +5,7 @@ Windows: [![Build Status](https://ci.appveyor.com/api/projects/status/github/jve
 # ImplicitEquations
 
 
-In a paper, [Tupper](http://www.dgp.toronto.edu/people/mooncake/papers/SIGGRAPH2001_Tupper.pdf)
+In a paper, [Tupper](https://doi.org/10.1145/383259.383267)
 presents a method for graphing two-dimensional implicit equations and
 inequalities. This package gives an
 implementation of the paper's basic algorithms to allow