Ronnason Chinram. 2009. Some properties of gamma-semigroups and gamma-rings. Songkhla:Prince of Songkla University;
Ronnason Chinram. (2009) Some properties of gamma-semigroups and gamma-rings. Prince of Songkla University:Songkhla.
Ronnason Chinram. Some properties of gamma-semigroups and gamma-rings. Songkhla:Prince of Songkla University, 2009. Print.
Ronnason Chinram. (2009) Some properties of gamma-semigroups and gamma-rings. Prince of Songkla University:Songkhla.