Kiattisak Phrathom และ Vichian Laohakosol. (2013) Dirichlet series and power series: solutions of algebric differential equations. Chulalongkorn University:ม.ป.ท.Kiattisak Phrathom และ Vichian Laohakosol. 2013. Dirichlet series and power series: solutions of algebric differential equations. ม.ป.ท.:Chulalongkorn University;Kiattisak Phrathom และ Vichian Laohakosol. Dirichlet series and power series: solutions of algebric differential equations. ม.ป.ท.:Chulalongkorn University, 2013. Print.