@article{oai:tsukuba.repo.nii.ac.jp:00016117,
 author = {Bainov, D.D and Angelova, D.C.},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {39--46},
 title = {On some oscillating properties of the solutions of a class of functional-differential equations},
 volume = {5},
 year = {1981}
}