Abaszade, R.G., O.A. Kapush, S.A. Mamedova, A.M. Nabiyev, S.Z. Melikova, and S.I. Budzulyak. 2020. “Gadolinium Doping Influence on the Properties of Carbon Nanotubes”. Physics and Chemistry of Solid State 21 (3):404-8. https://doi.org/10.15330/pcss.21.3.404-408.