International seminar of European group in automation of libraries (June, 6 - 8, 2001, Prague, Check Republic)

за авторством I. Levchenko
Опубліковано 2001

Formation of social demand for the public Association of scientists in the period of development of capitalism

за авторством I. Levchenko
Опубліковано 2017

Natural Science members, physical-chemical and mathematical society of Kharkiv

за авторством I. Levchenko
Опубліковано 2017

Congresses of naturalists and physicians, as an effective means of educational and promotional work in the second half of XIX – early XX century

за авторством I. Levchenko
Опубліковано 2016

The Analysis of Existing Methods of Solid Fuel Heat Treatment in Pre-Combustors (Review)

за авторством M. M. Jurchenko, A. I. Topal, N. I. Levchenko
Опубліковано 2010