Önder, MEkinci, Z2024-07-182024-07-180170-42141099-1476http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/3936In this study, by using the concepts and results on spherical curves in dual Lorentzian space, we give the criterions for ruled surfaces with non-lightlike ruling to be closed (periodic). Moreover, we obtain the necessary and sufficient conditions to guarantee that a timelike or a spacelike ruled surface is closed (periodic). Copyright (C) 2016 JohnWiley & Sons, Ltd.EnglishINVARIANTSArticle