From the beginning of 60th Olena Tsvek started studies of Trypillia Culture. She discovered and explored many ancient sites between Southern Bug and Dnipro, at the Eastern borders of Trypillia. Materials from this excavations were published in many books and articles. Many finds from Vesely Kut, Berezivka and other sites ehibited in many museums - from Kyiv to Cherkassy. Some of them trevelled with exhibitions to USA and Canada.