Sayan Tudsri, and Pensri Sornprasit. “Effects of Utilization Systems, Planting Methods and Type of Grass on Pasture Production of Centro and Hamata Mixed with Ruzi and Para on a Small Dairy Farm Conditions 1. Establishment and Survival”. Agriculture and Natural Resources, vol. 27, no. 1, Mar. 1993, pp. 6-13, https://li01.tci-thaijo.org/index.php/anres/article/view/241545.