diff --git a/docs/reference/analysis/tokenfilters/stemmer-tokenfilter.asciidoc b/docs/reference/analysis/tokenfilters/stemmer-tokenfilter.asciidoc
index fafa4cba022..7ea4e582e73 100644
--- a/docs/reference/analysis/tokenfilters/stemmer-tokenfilter.asciidoc
+++ b/docs/reference/analysis/tokenfilters/stemmer-tokenfilter.asciidoc
@@ -71,7 +71,7 @@ English::
 
 http://snowball.tartarus.org/algorithms/porter/stemmer.html[*`english`*] added[1.3.0,Returns the <<analysis-porterstem-tokenfilter,`porter_stem`>> instead of the <<analysis-snowball-tokenfilter,`english` Snowball token filter>>],
 http://ciir.cs.umass.edu/pubfiles/ir-35.pdf[`light_english`] added[1.3.0,Returns the <<analysis-kstem-tokenfilter,`kstem` token filter>>],
-http://www.medialab.tfe.umu.se/courses/mdm0506a/material/fulltext_ID%3D10049387%26PLACEBO%3DIE.pdf[`minimal_english`],
+http://www.researchgate.net/publication/220433848_How_effective_is_suffixing[`minimal_english`],
 http://lucene.apache.org/core/4_9_0/analyzers-common/org/apache/lucene/analysis/en/EnglishPossessiveFilter.html[`possessive_english`],
 http://snowball.tartarus.org/algorithms/english/stemmer.html[`porter2`] added[1.3.0,Returns the <<analysis-snowball-tokenfilter,`english` Snowball token filter>> instead of the <<analysis-snowball-tokenfilter,`porter` Snowball token filter>>],
 http://snowball.tartarus.org/algorithms/lovins/stemmer.html[`lovins`]