Aeppli, Alexander, Kim, Kyungtae, Warfield, William, Safronova, Marianna S, and Ye, Jun. Clock with 8×10−19 Systematic Uncertainty. Retrieved from https://par.nsf.gov/biblio/10541266. Physical Review Letters 133.2 Web. doi:10.1103/PhysRevLett.133.023401.

Aeppli, Alexander, Kim, Kyungtae, Warfield, William, Safronova, Marianna S, & Ye, Jun. Clock with 8×10−19 Systematic Uncertainty. Physical Review Letters, 133 (2). Retrieved from https://par.nsf.gov/biblio/10541266. https://doi.org/10.1103/PhysRevLett.133.023401

Aeppli, Alexander, Kim, Kyungtae, Warfield, William, Safronova, Marianna S, and Ye, Jun. "Clock with 8×10−19 Systematic Uncertainty". Physical Review Letters 133 (2). Country unknown/Code not available: American Physical Society. https://doi.org/10.1103/PhysRevLett.133.023401. https://par.nsf.gov/biblio/10541266.

@article{osti_10541266,
place = {Country unknown/Code not available}, title = {Clock with 8×10−19 Systematic Uncertainty}, url = {https://par.nsf.gov/biblio/10541266}, DOI = {10.1103/PhysRevLett.133.023401}, abstractNote = {}, journal = {Physical Review Letters}, volume = {133}, number = {2}, publisher = {American Physical Society}, author = {Aeppli, Alexander and Kim, Kyungtae and Warfield, William and Safronova, Marianna S and Ye, Jun}, }