V. B. Bastos and  M. P. Lima and  P. R. G. Kurka,  Virtual 3D Environments for Image-Based Navigation Algorithms.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2017, vol. 126(6). 720 - 727
    [viewed 03 March 2021]. Available from: https://publications.waset.org/pdf/10007252.