TY - CONF AU - Koo-hyun Chung AU - Gordon Shaw AU - Jon Pratt C2 - XIX IMEKO World Congress: Fundamental and Applied Metrology, Lisbon, -1 DA - 2009-09-03 LA - en PB - XIX IMEKO World Congress: Fundamental and Applied Metrology, Lisbon, -1 PY - 2009 TI - Accurate Picoscale Forces for Insitu Calibration of AFM ER -