@article{AM2_1977__16_136677,
     author = {D.D. Bainov and G.H. Sarafova},
     title = {Application of the averaging method for a two-point boundary problem for systems of integro-differential equations of {Fredholm} type.},
     journal = {Aequationes mathematicae},
     pages = {71--80},
     publisher = {mathdoc},
     volume = {16},
     year = {1977},
     zbl = {0382.45009},
     url = {http://geodesic.mathdoc.fr/item/AM2_1977__16_136677/}
}