Henning, Torsten (1999-01-27). "Charging effects in niobium nanostructures". pp. 56, 60. arXiv:cond-mat/9901308. /wiki/ArXiv_(identifier) ↩
Degarmo, Black & Kohser 2003, p. 897. - Degarmo, E. Paul; Black, J T.; Kohser, Ronald A. (2003), Materials and Processes in Manufacturing (9th ed.), Wiley, ISBN 0-471-65653-4 ↩