Чигарев, В.В., Гавриш, П.А. and Васильева, Л.В. 2011. Increase of the productivity of welding of cooper with steel. Eastern-European Journal of Enterprise Technologies. 4, 5(52) (Dec. 2011), 4–7. DOI:https://doi.org/10.15587/1729-4061.2011.1395.