Eliza. E. Camaso and  Guiller. B. Damian and  Miguelito. F. Isip and  Ronaldo T. Alberto ,  Landcover Mapping Using Lidar Data and Aerial Image and Soil Fertility Degradation Assessment for Rice Production Area in Quezon, Nueva Ecija, Philippines.   journal   = {International Journal of Computer and Systems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2017, vol. 127(7). 535 - 540
    [viewed 18 September 2020]. Available from: https://publications.waset.org/pdf/10007762.