1.
Nikiforov I, Maltsev P, Ivanov V, Barsuk I. Explanation of the express method of the determination of steel grade by spark. ETR [Internet]. 2015 Jun. 16 [cited 2024 Dec. 21];1:157-61. Available from: https://journals23.rta.lv/index.php/ETR/article/view/225