On the Existence of Relations (2009): ontology16
On Relation Senses (2011): ontology15
On Converse Relations (2014): ontology14 NH
On Relations as Universals (2011): ontology18
On Thin and Thick Relations (2011): ontology17
On the Parthood Relation (2015): relations1 NH
On the Similarity Relation (2019): ontology 19 NH