1. Ulam stabilities of ordinary differential equations in a banach space;Rus;Carpathian J. Math.,2010
2. Ulam Stability of Operators;Brzdek,2018
3. Dynamical systems;Arnold,2000
4. Ulam stability of ordinary differential equations;Rus;Stud. Univ. Babes-Bolyai, Mathematica,2009
5. A fixed point approach to the stability of differential equations y′=f(x,y);Jung;Bull. Malays. Math. Sci. Soc. (2),2010