Sayan Tudsri. “Effect of seed-bed pre-treatment in the establishment of Siratro (Macroptilium atropurpureum) oversown in Para grass pasture”. Agriculture and Natural Resources, vol. 21, no. 2, June 1987, pp. 126-31, https://li01.tci-thaijo.org/index.php/anres/article/view/242591.