Journals / Technical University of Istanbul Bulletin / 1992 / Cilt: 45 - Sayı: 1A perturbation analysis of nonlinear forced oscillationsKoncay HÜSEYİN,Shiqi WANGJournalTechnical University of Istanbul BulletinIssue1992 · Cilt: 45 - Sayı: 1Pages87–98DOI—