H. Lal, A. de S. Silva, E. R. Porto, and A. E. M. da Costa, “Animal drawn ridger-blade and its use in a new type of in situ rainwater harvesting system”, PAB, vol. 19, no. 11, pp. 1385–1393, Apr. 2014, doi: 10.1590/S1678-3921.pab1984.v19.16180.