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+++ b/README.md
@@ -8,6 +8,7 @@ BBCH-based Plant Phenological Description Ontology (ppdo) is an ontology that ex
 More information about this ontology and associated datasets are available on http://ontology.irstea.fr/pmwiki.php/Site/Ppdo
 
 ppdo metadata are  published on the web at the uri http://ontology.inrae.fr/ppdo
+ppdo is also described in data. inrae https://doi.org/10.15454/TIMQHW
 
 A sparql end point to query ppdo and related datasets are available at http://ontology.inrae.fr/ppdo/sparql