1. SI Brochure www.bipm.org
2. B. Andreas et al., Determination of the Avogadro constant by counting the atoms in a 28Si crystal. Phys. Rev. Lett. 106, 030801 (2011)
3. http://www.bipm.org/en/bipm/mass/avogadro
4. Yeditepe University dimensional calibration services (YUKAL) handbook (Istanbul, Turkey, 2010)
5. E.L. Wolf, Nanophysics and nanotechnology (Wiley-VCH Weinheim, Germany, 2005), pp. 28–37