G. Kun, A. Nagy, H. Shunsuke, T. Maasa, and I. Kazuyuki, “Methane emission from Matsuo rice paddy field in light of different fertilizers, costs, profit and carbon credit”, Acta agrar. Debr., no. 69, pp. 9–13, Mar. 2016, doi: 10.34101/actaagrar/69/1781.