@conference{90681, author = {Ulf Griesmann and Nadia Machkour-Deshayes and Byoung Kim and Quandou Wang and Lahsen Assoufid}, title = {Uncertainties in Aspheric Profile Measurements with the Geometry Measuring Machine at NIST}, year = {2005}, number = {5878}, month = {2005-07-31}, publisher = {SPIE - Optics and Photonics, San Diego, CA}, language = {en}, }