Sirawich Chinwarakorn และ Sajee Pianskool. (2010) Vague prime ideals and vague primary ideals of vague rings. Chulalongkorn University:ม.ป.ท.Sirawich Chinwarakorn และ Sajee Pianskool. 2010. Vague prime ideals and vague primary ideals of vague rings. ม.ป.ท.:Chulalongkorn University;Sirawich Chinwarakorn และ Sajee Pianskool. Vague prime ideals and vague primary ideals of vague rings. ม.ป.ท.:Chulalongkorn University, 2010. Print.