Raúl Pereda García and  Julio Manuel de Luis Ruiz and  Elena Castillo López and  Rubén Pérez Álvarez and  Felipe Piña García,  Analysis of the Accuracy of Earth Movement with Drone Surveys.   journal   = {International Journal of Geotechnical and Geological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2019, vol. 151(7). 500 - 504
    [viewed 22 January 2022]. Available from: https://publications.waset.org/pdf/10010579.