Ilkka Niskanen and  Jarmo Kalaoja and  Julia Kantorovitch and  Toni Piirainen,  An Interactive Ontology Visualization Approach for the Networked Home Environment .   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2007, vol. 3(3). 591 - 596
    [viewed 24 October 2021]. Available from: https://publications.waset.org/pdf/7838.