H. Dujmic and  V. Papic and  H. Turic,  A New Method for Detection of Artificial Objects and Materials from Long Distance Environmental Images.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2008, vol. 19(7). 1403 - 1407
    [viewed 02 April 2020]. Available from: https://publications.waset.org/pdf/2356.