The most important publications in English are the following:
1. Turitsyna M.V., Chernobrovin E.V., Morozov V.A., Kovalev A.V., Ryabokon E.P. Gas-liquid washover mixtures for well completion in conditions of abnormally low formation pressure // Neftyanoe khozyaystvo – Oil Industry, 2012. – №8. – P. 111–113.
2. Turitsyna M.V., Kovalev A.V., Morozov V.A., Chernobrovin E.V., Shcherbakov A.A. Gas-liquid washover mixtures for the primary opening of productive layers in conditions of abnormally low reservoir pressure // Neftyanoe khozyaystvo – Oil Industry, 2012. – №9. – P. 58–59.
3. Vorobyev S.V., Dorovskikh I.V., Kovalev A.V., Epihin A.V., Lunkov G.V., Bubnov A.S., Melekhin A.A. Combination of physicochemical methods for bottom-hole zone treatment // Neftyanoe khozyaystvo – Oil Industry, 2013. – №1. – P. 94–95.
4. Pellet impact drilling operational parameters: experimental research [Electronic resource] / A. V. Kovalev [et al.] // IOP Conference Series: Earth and Environmental Science. – 2015. – Vol. 24: Scientific and Technical Challenges in the Well Drilling Progress, 24–27 November 2014, Tomsk, Russia. – [012015, 8 p.].
5. Designing the ejector pellet impact drill bit for hard andtough rock drilling [Electronic resource] / A. V. Kovalev [et al.] // IOP Conference Series: Earth and Environmental Science. – 2015. – Vol. 24: Scientific and Technical Challenges in the Well Drilling Progress, 24–27 November 2014, Tomsk, Russia. – [012016, 6 p.].
6. Arresting and supplying apparatus for increasing pellet impact drilling speed per run [Electronic resource] / A. V. Kovalev [et al.] // IOP Conference Series: Earth and Environmental Science. – 2015. – Vol. 27: Problems of Geology and Subsurface Development. – [012054, 4 p.].
