Anderson Rocha and  Pedro Miguel de Figueiredo Dinis Oliveira Gaspar,  Algorithm for Path Recognition in-between Tree Rows for Agricultural Wheeled-Mobile Robots.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
     2019, vol. 145(1). 34 - 37
    [viewed 22 November 2019]. Available from: https://publications.waset.org/pdf/10009950.