Geahča maid: Introduction to the theory and application of differential equations with deviating arguments /
Fáddá: Delay differential equations.
Fáddá: Differential-difference equations.
Dahkki: Ėlʹsgolʹt͡s, L. Ė. (Lev Ėrnestovich)
Dahkki: Norkin, S. B. (Sim Borisovich)