Prikhna T. Modern superconductive materials for electrical machines and devices working on the principle of levitation: Experimental Methods and Applications. Fiz. Nizk. Temp. [інтернет]. 20, Березень 2006 [цит. за 10, Листопад 2025];32(4-5):661-76. доступний у: http://80.92.230.95/index.php/fnt/article/view/f32-0661e