TY - JOUR AU - Jefferts, Steven AU - Heavner, Thomas AU - Barlow, Stephan AU - Ashby, Neil C2 - Physical Review A DA - 2015-06-18 DO - https://doi.org/10.1103/PhysRevA.91.067601 LA - en M1 - 91 PB - Physical Review A PY - 2015 TI - Comment on 'Ramsey Spectroscopy, matter-wave interferometry, and the microwave-lensing frequency shift' ER -