Bainov D.Dimitrova M.Dishliev A.2024-11-132024-11-142024-11-132024-11-141998-01-010035-759610.1216/rmjm/1181071821SCOPUS_ID:0032339489https://rlib.uctm.edu/handle/123456789/1472Sufficient conditions for oscillation of all solutions of a class of impulsive differential equations and inequalities with a retarded argument and fixed moments of impulse effect are found. © 1998 Rocky Mountain Journal of Mathematics. © 1998 Applied Probability Trust.enArticle