D.
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Haddad, D. ., Seifert, F. ., Chao, L. S., Li, S. ., Newell, D. B., Pratt, J. R., … Schlamminger, S. . (2016). Invited Article: A precise instrument to determine the Planck constant, and the future kilogram. Review of Scientific Instruments, 87. http://doi.org/10.1063/1.4953825
Haddad, D. ., Seifert, F. ., Chao, L. S., Possolo, A. ., Newell, D. B., Pratt, J. R., … Schlamminger, S. . (2017). Measurement of the Planck constant at the National Institute of Standards and Technology from 2015 to 2017. Metrologia, 54, 633–641. http://doi.org/10.1088/1681-7575/aa7bf2
Chao, L. S., Schlamminger, S. ., Newell, D. B., Pratt, J. R., Seifert, F. ., Zhang, X. ., … Haddad, D. . (2015). A LEGO Watt balance: An apparatus to determine a mass based on the new SI. American Journal of Physics, 83, 913–922. http://doi.org/10.1119/1.4929898