WASET
    Varun Gupta and  Jitender Kumar Chhabra,  Object-Oriented Cognitive-Spatial Complexity Measures.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2009, vol. 27(3). 830 - 837
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/9219.