Nakane, Koji. 2013. “Formation of Inorganic Nanofibers by Heat-Treatment of Poly(vinyl Alcohol)-Zirconium Compound Hybrid Nanofibers”. Journal of Mining and Metallurgy, Section B: Metallurgy 49 (1): 77. https://asistent.ceon.rs/index.php/jmm/article/view/2808.