Chakkrit Snae and  Michael Brueckner,  Personal Health Assistance Service Expert System (PHASES).   journal   = {International Journal of Health and Medical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2007, vol. 8(8). 344 - 347
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/15435.