Demircan, OsmanBulut, Ibrahim2025-01-272025-01-272015978-1-58381-877-0978-1-58381-876-3https://hdl.handle.net/20.500.12428/28068Conference on Living Together: Planets, Host Stars and Binaries -- SEP 08-12, 2014 -- Litomysl, CZECH REPUBLICPeriod changes in contact binaries obtained by the analysis of times of eclipse are often found to be chaotic in nature. However, they may be representable by a few cyclic changes superposed on a secular change. The cyclic changes are most likely caused by third components revolving around the contact binaries. This contribution shows some typical examples of the period changes in contact binaries.eninfo:eu-repo/semantics/closedAccessConference Object496114117N/AWOS:000369467900017