TY - JOUR KW - pfc AU - S. Porsev AU - A. Ludlow AU - M. Boyd AU - Jun Ye BT - Physical Review A DA - 9/2008 DO - 10.1103/PhysRevA.78.032508 PY - 2008 T2 - Physical Review A TI - Determination of Sr properties for a high-accuracy optical clock VL - 78 SN - 1050-2947 ER -