http://energostal.kharkov.ua/content/documents/22/2177/Attaches/mishyak_1_red.titul.pdf
http://energostal.kharkov.ua/content/documents/22/2177/Attaches/myishyak_1_red._1_variant.pdf
http://energostal.kharkov.ua/content/documents/22/2177/Attaches/poyasn._zapiska_1_red..pdf