Velychko O. M. Processing of information flow by the interaction of the elements of the printed contact / Olena Velychko: monograph. – K.: Publishing center «Kyiv University», 2005. – 264 р.
Velychko O. M. Publishing and printing business. Workshop on design and calculation of technological and production processes / Olena Velychko : textbook. manual.; Ministry of education and science of Ukraine. – K.: Publishing center “Kyiv University”, 2009. – 520 p. – ISBN 978-966-439-135-8.
Velychko О. М. Theoretical bases of co-operation of informative, power and material streams in the printing contact. — Manuscript.
Khohlova R. A. Conformities to the law of interference layers of varnish end printing-ink in the printing process of offset printing. — Manuscript.
0113U002138 “Research and development of process automation of sheet transfer systems offset sheetfed presses”, Scientific leader: prof. Morflyuk V.F., рerformers: Churkin V.V, Karpenko I.S.
0111U001866, NTUU “KPI”, “Organic materials for creating printing varnishes and paints that bioresource”, scientific supervisor – associate professor Khokhlova Rozaliya A.