diff --git a/src/cco-modules/GeospatialOntology.ttl b/src/cco-modules/GeospatialOntology.ttl
index 05c0eb7..94914a7 100644
--- a/src/cco-modules/GeospatialOntology.ttl
+++ b/src/cco-modules/GeospatialOntology.ttl
@@ -45,7 +45,6 @@ cco:coincides_with rdf:type owl:ObjectProperty ;
                    rdfs:domain obo:BFO_0000141 ;
                    rdfs:range obo:BFO_0000141 ;
                    cco:definition "An immaterial entity im1 coincides with some immaterial entity im2 iff im1 is a spatial part of im2 and im2 is a spatial part of im1."@en ;
-                   cco:definition_source "Randell, D. A., Cui, Z. and Cohn, A. G.: 1992, \"A spatial logic based on regions and connection,\" Proc. 3rd Int. Conf. on Knowledge Representation and Reasoning, Morgan Kaufmann, San Mateo, pp. 165-176. Available at: https://www.dpi.inpe.br/gilberto/references/cohn_rcc.pdf"@en ;
                    cco:is_curated_in_ontology "http://www.ontologyrepository.com/CommonCoreOntologies/Mid/GeospatialOntology"^^xsd:anyURI ;
                    rdfs:label "coincides with"@en ;
                    skos:scopeNote "Given a stronger temporal interpretation, this property may be transitive and symmetric. For more info please refer to https://github.com/BFO-ontology/BFO-2020/tree/master/src/owl/temporal%20extensions."@en .
@@ -56,7 +55,6 @@ cco:connected_with rdf:type owl:ObjectProperty ;
                    rdfs:domain obo:BFO_0000141 ;
                    rdfs:range obo:BFO_0000141 ;
                    cco:definition "An immaterial entity im1 is connected with some immaterial entity im2 iff there exists some immaterial entity im3 that is common to both im1 and im2."@en ;
-                   cco:definition_source "Randell, D. A., Cui, Z. and Cohn, A. G.: 1992, \"A spatial logic based on regions and connection,\" Proc. 3rd Int. Conf. on Knowledge Representation and Reasoning, Morgan Kaufmann, San Mateo, pp. 165-176. Available at: https://www.dpi.inpe.br/gilberto/references/cohn_rcc.pdf"@en ;
                    cco:is_curated_in_ontology "http://www.ontologyrepository.com/CommonCoreOntologies/Mid/GeospatialOntology"^^xsd:anyURI ;
                    rdfs:label "connected with"@en ;
                    skos:scopeNote "Given a stronger temporal interpretation, this property may be symmetric. For more info please refer to https://github.com/BFO-ontology/BFO-2020/tree/master/src/owl/temporal%20extensions."@en .
@@ -67,7 +65,6 @@ cco:disconnected_with rdf:type owl:ObjectProperty ;
                       rdfs:domain obo:BFO_0000141 ;
                       rdfs:range obo:BFO_0000141 ;
                       cco:definition "An immaterial entity im1 is disconnected with some immaterial entity im2 iff there does not exist some immaterial entity im3 that is common to both im1 and im2."@en ;
-                      cco:definition_source "Randell, D. A., Cui, Z. and Cohn, A. G.: 1992, \"A spatial logic based on regions and connection,\" Proc. 3rd Int. Conf. on Knowledge Representation and Reasoning, Morgan Kaufmann, San Mateo, pp. 165-176. Available at: https://www.dpi.inpe.br/gilberto/references/cohn_rcc.pdf"@en ;
                       cco:is_curated_in_ontology "http://www.ontologyrepository.com/CommonCoreOntologies/Mid/GeospatialOntology"^^xsd:anyURI ;
                       rdfs:label "disconnected with"@en ;
                       skos:scopeNote "Given a stronger temporal interpretation, this property may be symmetric. For more info please refer to https://github.com/BFO-ontology/BFO-2020/tree/master/src/owl/temporal%20extensions."@en .