ශය 2007-12-09.{{cite web}}:  CS1 maint: date format (link)↑ Mohr, Peter J. (2008). "CODATA Recommended Values of the Fundamental Physical Constants: 2006". Rev. Mod. Phys. 80 (2): 633–730. Bibcode:2008RvMP...80..633M. doi:10.1103/RevModPhys.80.633. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help) Direct link to value.↑ "ඇවගාඩ්රෝ ව්‍යාපෘතිය(Avogadro Project)". ජාතික භෞතීය රසායනාගාරය (National Physical Laboratory). සම්ප්‍රවේශය 2010-08-19.↑ Leonard, B. P. (2007). "On the role of the Avogadro constant in redefining SI units for mass and amount of substance". Metrologia. 44 (1): 82–86. Bibcode:2007Metro..44...82L. doi:10.1088/0026-1394/44/1/012.↑ 19.0 19.1 Jabbour, Zeina J. (2009). "Getting Closer to Redefining The Kilogram". Weighing & Measurement Magazine (October): 24–26.↑ Becker, Peter (2003). "Tracing the definition of the kilogram to the Avogadro constant using a silicon single crystal". Metrologia. 40 (6): 366–75. Bibcode:2003Metro..40..36