TY - JOUR AU - Achkar, Joseph AU - Bauch, Andreas AU - Dach, R AU - Hlavac, R AU - Lorini, Luca AU - Parker, Thomas AU - Petit, G. AU - Piester, Dirk AU - Uhrich, P AU - Szymaniec, K 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 -