diff --git a/ontology/saref4ehaw.ttl b/ontology/saref4ehaw.ttl
index 3c4ed38c60fef01b95908cd911badcd653f74a1b..a48ea61b359282eebebd2326eb400a036908e31e 100644
--- a/ontology/saref4ehaw.ttl
+++ b/ontology/saref4ehaw.ttl
@@ -28,6 +28,7 @@
                                       vann:preferredNamespaceUri "https://saref.etsi.org/saref4ehaw/" ;
                                       dcterms:issued "2020-02-01"^^xsd:date ;
 				      dcterms:modified "2020-05-01"^^xsd:date ;
+                                      rdfs:seeAlso <https://www.etsi.org/deliver/etsi_ts/103400_103499/10341008/01.01.01_60/ts_10341008v010101p.pdf> ;
                                       dcterms:title "SAREF4EHAW: an extension of SAREF for eHealth Ageing Well domain"@en ;
                                       dcterms:description """The objective of SAREF4EHAW is to extend SAREF ontology for the eHealth/Ageing-well (EHAW) vertical. Clause 4.1 of the present document shortly introduces a high level view of the envisioned SAREF4EHAW semantic model and modular ontology, with the retained concepts (i.e. classes) and their relations. 
 SAREF4EHAW extension has been specified and formalised by investigating EHAW domain related resources, as reported in ETSI TR 103 509, such as: potential stakeholders, standardization initiatives, alliances/associations, European projects, EC directives, existing ontologies, and data repositories. Therefore, SAREF4EHAW modular ontology shall both: