Periodic solutions of second-order nonlinear system of integro-differential equations unsolvable for the highest derivative
By: Butris, Rad N.. al-Tarbiyah wa-al-Ilm : Majallat ilmiyah lil-Buhuth al-Ilmiyah al-Asasiyah. Vol. 21, no. 1 (Mar. 2008), pp.78-89, 12 p.
Subjects: Differential equations; Mathematical analysis; Mathematical physics