Ravi Shankar, [http://ncor.buffalo.edu/2014/03132014_CTO.pdf Clinical Trial Ontology], March 13, 2014

CDISC Phuse [http://www.phusewiki.org/docs/2010/2010%20PAPERS/CD03%20Paper.pdf paper on LabTests], 2010

[http://www.bioontology.org/wiki/index.php/Workshop_on_Clinical_Trial_Ontology Clinical Trial Ontology Meeting], 2007

[http://cdiscguru.blogspot.com/ CDISC Guru]