https://www.nist.gov/publications/pulse-transition-duration-measurements-and-standards-nbs-1975-1988
Pulse transition duration measurements and standards at NBS - 1975 to 1988: | NIST
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https://www.bipm.org/en/bipm-workshops/quantum-tech?p_p_id=com_liferay_login_web_portlet_LoginPortlet&p_p_lifecycle=0&p_p_state=normal&p_p_state_rcv=1
Quantum Technologies through Measurements and Standards - BIPM
measurements and standardsquantum technologiesbipm