Pattarawan Petchkhaew และ Amorn Wasanawichit. (2011) Ideal theory in some ternary semirings. Chulalongkorn University:ม.ป.ท.Pattarawan Petchkhaew และ Amorn Wasanawichit. 2011. Ideal theory in some ternary semirings. ม.ป.ท.:Chulalongkorn University;Pattarawan Petchkhaew และ Amorn Wasanawichit. Ideal theory in some ternary semirings. ม.ป.ท.:Chulalongkorn University, 2011. Print.