Paolo Chiabert Mario Costa Statistical Modelling of Nominal and Measured Mechanical Surfaces. 87-94 2003 3 J. Comput. Inf. Sci. Eng. 1 http://ojps.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JCISB6000003000001000087000001&idtype=cvips&gifs=Yes db/journals/jcise/jcise3.html#ChiabertC03