TY - JOUR AU - Joseph Achkar AU - Andreas Bauch AU - R Dach AU - R Hlavac AU - Luca Lorini AU - Thomas Parker AU - G. Petit AU - Dirk Piester AU - P Uhrich AU - K Szymaniec C2 - Metrologia DA - 2006-02-01 LA - en M1 - 43 PB - Metrologia PY - 2006 TI - Comparison between frequency standards in Europe and the USA at the 10−15uncertainty level UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50344 ER -