Jie Cai and  David C. Levy,  Source Direction Detection based on Stationary Electronic Nose System.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2008, vol. 15(3). 510 - 514
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/6211.