@article{702198,
     title = {Application of the averaging method for the solution of boundary problems for ordinary differential and integro-differential equations},
     booktitle = {Equadiff IV},
     series = {GDML\_Books},
     publisher = {Springer-Verlag},
     address = {Berlin},
     year = {1979},
     pages = {[16]-24},
     mrnumber = {MR0933161},
     zbl = {0437.34038},
     url = {http://dml.mathdoc.fr/item/702198}
}

Bainov, D. D.; Milusheva, S. D. Application of the averaging method for the solution of boundary problems for ordinary differential and integro-differential equations, dans Equadiff IV, GDML_Books,  (1979), pp. [16]-24. http://gdmltest.u-ga.fr/item/702198/