TY - CONF AU - Marc Weiss AU - D Allan AU - David Howe C2 - 1992 IEEE Frequency Control Symposium , Hershey, PA DA - 1992-01-01 LA - en PB - 1992 IEEE Frequency Control Symposium , Hershey, PA PY - 1992 TI - Confidence on the Second Difference Estimation of Drift ER -