Reliability Evaluation for Improved Screw Dies of Coiled Tubing Unit Injector von Igtisamova, G.R., Kovalev, N.O.

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Variability of the Carbon isotope composition 13C/12C of soils and cultural layers of geoarcheological monuments, Russian plain von Kovaleva, N.O., Reshetnikova, R.A., Kovalev, I.V., Stolpnikova, E.M.

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Evaluation of the effect of modern drainage technologies on the physical properties and productivity of mineral hydromorphic soils von Kovalev, I V, Kovaleva, N O

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Lignin phenols in soils as biomarkers of paleovegetation von Kovaleva, N. O, Kovalev, I. V

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Lignin in the Organic Matter of the Soils of the Russian Plain as Biomarker of Palaeoenvironment von Kovalev, I V, Kovaleva, N O

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The Carbon Isotope Composition of Organic Matter and the Age of Paleosols from Wurm Glaciations Interstadials to Holocene (Bryansk region, Russia) von Stolpnikova, E M, Kovaleva, N O, Kovalev, I V

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Transformation of lignin in surface and buried soils of mountainous landscapes von Kovaleva, N. O., Kovalev, I. V.

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Organophosphates in Agrogray Soils with Periodic Water Logging According to the Data of [sup.31]P NMR Spectroscopy von Kovalev, I.V, Kovaleva, N.O

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Biochemistry of lignin in soils of periodic excessive moistening (from the Example of Agrogray Soils in Opolie Landscapes of the Russian Plain) von Kovalev, I. V., Kovaleva, N. O.

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DEVICE FOR FORMING WELL AIR-CUSHIONED CHARGES von KOVALEV A.A.,SU, SEINOV N.P.,SU, YUSHKIN A.D.,SU, CHOLAKH N.O.,SU

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