References
- Vitasek , M . 1986 . ‘Research into the effect of multiple repairs of welded joints on the mechanical properties of the material.’ , Bratislava : Welding Research Institute . Progress report
- Vitasek , M . 1987 . ‘Problems of multiple repair of circumferential welded joints in gas pipelines of X70 steel.’ , Bratislava : Czechoslovak Academy of Sciences . Compilation of Lectures
- Hanova , E . 1979 . ‘Determination of conditions for welding gas transmission pipelines made of X70 steel and evaluation of welded joints.’ , Bratislava : Welding Research Institute . Final report
- Mraz , L . 1986 . Bratislava : Welding Research Institute . Report Mg 44
- Vitasek , M . 1987 . ‘Research into the effect of repair of welded joints on the mechanical properties of material.’ , Bratislava : Welding Research Institute . Progress report
- Elias , V . 1984 . ‘Research into the effect of multiple repairs of welded joints on mechanical properties.’ , Bratislava : Welding Research Institute . Progress report