Lb. Knyazhishche et Va. Shcheglov, USE OF NONMONOTONE LIAPUNOV FUNCTIONALS F OR INVESTIGATING SOLUTION BOUNDEDNESS OF DELAY-DIFFERENTIAL EQUATIONS, Doklady Akademii nauk BSSR, 41(6), 1997, pp. 34-38
Boundedness and uniform boundedness conditions for solutions of delay
differential equations are given in terms of nonmonotone along solutio
ns Liapunov functionals. The functionals are not supposed to be positi
vely definite. Coefficient conditions of the boundedness are offered f
or linear scalar equations with concentrated and distributed delay.