Strategic Management of Ukrainian Technological Parks' Activity von Yu. Petryna, Ya. Palahitskyi

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Degradation of welded joint metal of the exploited main gas pipeline von O. T. Tsyrulnyk, V. A. Voloshyn, Yu. Petryna, M. I. Hredil, O. I. Zvirko

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Surface strengthening of 40X steel by electric spark alloying von S. I. Kryshtopa, Yu. Petryna, I. M. Bohatchuk, I. B. Prunko, V. M. Melnyk

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Corrosion and corrosion-mechanical fracture of crude oil tank steel von Yu. Petryna, V. M. Hohol, Yu. D. Petryna, O. I. Zvirko, Yu. M. Nykyforchyn

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The influence of alloying with rare earth metals on mechanical properties of 17H1S pipe steel von Yu. Petryna, O. L. Kozak, B. R. Shuliar, Yu. D. Petryna, M. I. Hredil

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