Saenjan, P., S. Ro, and P. Vityakon. “Methane Fluxes and Rice Yields As a Function of Sulfate Fertilizer With Incorporated Rice Stubble”. Asia-Pacific Journal of Science and Technology, vol. 20, no. 3, Sept. 2015, pp. 337-45, doi:10.14456/kkurj.2015.28.