Application of the averaging method for the solution of boundary problems for ordinary differential and integro-differential equations Bajnov, D. D.; Milusheva, S. D. — 1979 Equadiff IV
Partial averaging for impulsive differential equations with supremum. Bainov, D.; Domshlak, Yu.; Milusheva, S. — 1996 Georgian Mathematical Journal
Justification of the averaging method for multipoint boundary value problems for a class of functional-differential equations with maximums. S. D. Milusheva; D. D. Bainov — 1986 Collectanea Mathematica