by Kovtunenko, K.V., Kovtunenko, Yu.V., Fomina, N.M., Kovalchuk, O.V., Kovtunenko, D.Yu
Published in International journal of production management and engineering (29.07.2022)

by Kovalchuk, O.V.
Published in Semiconductor physics, quantum electronics, and optoelectronics (03.12.2018)

by Kovalchuk, O.V.
Published in Semiconductor physics, quantum electronics, and optoelectronics (29.03.2018)

by Vovk, V.E., Kovalchuk, O.V., Kopčanský, P., Kovalchuk, T.M.
Published in Semiconductor physics, quantum electronics, and optoelectronics (01.01.2020)

by Poberezhets, S.I., Kovalchuk, O.V., Studenyak, I.P., Kovalchuk, T.M., Poberezhets, I.I., Lacková, V., Timko, M., Kopčanský, P.
Published in Semiconductor physics, quantum electronics, and optoelectronics (01.01.2020)

by Kovalchuk, O.V.
Published in Semiconductor physics, quantum electronics, and optoelectronics (01.10.2016)

by Kovalchuk, O.V., Studenyak, I.P., Izai, V.Yu, Rybak, S.O., Pogodin, A.I., Kopčanský, P., Timko, M., Gdovinova, V., Mariano, J., Kovalchuk, T.M.
Published in Semiconductor physics, quantum electronics, and optoelectronics (07.12.2017)

by KOVALCHUK, O.V
Published in AZIMUTH OF SCIENTIFIC RESEARCH: ECONOMICS AND ADMINISTRATION (30.08.2021)

by LEKHTYANSKAYA, L.V, KOVALCHUK, O.V
Published in KARELIAN SCIENTIFIC JOURNAL (30.08.2021)

by Kovalchuk, O.V.
Published in Semiconductor physics, quantum electronics, and optoelectronics (05.12.2016)

by Kovalchuk, A. A., Kovalchuk, O.V.
Published in This bulletin of the Kamianets-Podilskyi National Ivan Ohiienko University. Physical education, Sport and Human Health (17.06.2019)

by Kovalchuk, O.V
Published in AZIMUTH OF SCIENTIFIC RESEARCH: ECONOMICS AND ADMINISTRATION (31.05.2019)

by Kovalchuk, O.V., Kovalchuk, T.M., Tomašovičová, N., Timko, M., Zakutanska, K., Miakota, D., Kopčanský, P., Shevchuk, O.F., Garbovskiy, Y.
Published in Journal of molecular liquids (15.11.2022)

by Kovalchuk, O.V., Studenyak, I.P., Kovalchuk, T.M., Ayryan, E.A., Paulovičová, K., Timko, M., Kopčanský, P.
Published in Semiconductor physics, quantum electronics, and optoelectronics (23.11.2021)

by Garbovskiy, Y.A., Kopčanský, P., Kovalchuk, O.V., Kovalchuk, T.M., Volokh, L.V.
Published in Semiconductor physics, quantum electronics, and optoelectronics (26.06.2023)

by Lazurenko, N V, Podporinova, N N, Polenova, M E, Kovalchuk, O V, Nikulina, T V
Published in Problemy sotsial'noi gigieny, zdravookhraneniia i istorii meditsiny (01.05.2023)

by V.P. Ivanov, T.M. Kostrubska, O.V. Kovalchuk
Published in Acta medica Leopoliensia (01.12.2016)

by Kopčanský, P., Timko, M., Studenyak, I.P., Kovalchuk, O.V., Oleinikova, I.V., Kovalchuk, T.M.
Published in Journal of molecular liquids (01.02.2017)

by Vovk, V.E.
Published in Semiconductor physics, quantum electronics, and optoelectronics (03.12.2018)

by Kovalchuk, O.V., Kovalchuk, T.M., Garbovskiy, Y.A., Svistilnik, R.F., Pushkarov, D.V., Volokh, L.V., Lagoda, O.A., Oleinikova, I.V.
Published in Semiconductor physics, quantum electronics, and optoelectronics (01.01.2023)