Salyut 7 EP-4. A pictorial history of welding as seen through the pages of the Welding Journal. American Welding Society Архив на оригинала от 2012-04-18
“ Welding Design & Fabrication. 75.12 (Dec 2002): 48(6). General OneFile. Gale (subscription). Baker, Derek. "Guard your eyes and face when welding, cutting
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Einmischungen, Essays, 2001 Ohnehin. Roman, 2004 И без това, изд.: MAGA Welding, София (2012), прев. Пенка Ангелова Der ewige Widerstand. Über einen strittigen