TY - JOUR AU - K Szymaniec AU - W Chalupczak AU - S Weyers AU - R. Wynands AU - Eite Tiesinga AU - Carl Williams C2 - SPIE Optics and Photonics Conference DA - 2007-09-13 00:09:00 LA - en M1 - 6673 PB - SPIE Optics and Photonics Conference PY - 2007 TI - Manipulation of the Collisional Frequency Shift in Caesium Fountain Clocks ER -