Kp. Optimization of heavy steel casting manufacturing technology / Rafał Dojka, Wojciech Kaczkowski, Michał Jaromin // 73rd World Foundry Congress "Creative Foundry", 23rd-27th September 2018, Kraków, Poland : congress proceedings : scientific and technical / Polish Foundrymen's Association, World Foundry Organization. - [Kraków], 2018. - S. 547-548.

Krajowy Rejestr Sądowy, 28.11.2018 http://www.krs-online.com.pl/msig-4824-283121.html

OPI online, 28.11.2018 BNPol online, 28.11.2018