@article{oai:tsukuba.repo.nii.ac.jp:00016058, author = {D.D., Bainov and S.D., Milusheva}, issue = {1}, journal = {Tsukuba Journal of Mathematics}, month = {Jun}, pages = {1--19}, title = {Justification of partially-multiplicative averaging for a class of functional-differential equations with variable structure and impulses}, volume = {9}, year = {1985} }