McRobbie, M. A., B. C. Wheeler, B. Plale, and C. A. Stewart, Indiana University Pervasive Technology Institute Report to the Lilly Endowment, Inc. 36 Month Program Report Jun 1, 2011 - Nov 30, 2011 : Indiana University, Dec 2011, http://pti.iu.edu/sites/default/files/pti_36mo_report_final.pdf.

Jensen, S., M. Cox, D. Bender, M. Chen, J. England, B. Plale, and D. Leake, "Spatial Data in an Ontology for Research on Forest Resources" COSIT11 workshop Ontology of Spatial Thinking and Reasoning: Multidisciplinary Reconciliation, Belfast, Maine, Sep 12 2011, http://pti.iu.edu/sites/default/files/spatial_data_in_an_ontology_for_research_on_forest_resources.pdf.