Towards a standard upper ontology. - Ian Niles; Adam Pease (FOIS, 2001)

IEEE standard upper ontology: a progress report. - Adam Pease; Ian Niles (Knowl. Eng. Rev., 2002)

Linking Lixicons and Ontologies: Mapping WordNet to the Suggested Upper Merged Ontology. - Ian Niles; Adam Pease (IKE, 2003)

The MILO: A General-purpose, Mid-level Ontology. - Ian Niles; Allan Terry (IKE, 2004)