Processing and properties of bulk ultrafine-grained pure niobiumKommel, Lembit; Kimmari, Eduard; Saarna, Mart; Viljus, MartJournal of materials science2013 / p. 4723-4729 : ill https://doi.org/10.1007/s10853-013-7210-3 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS