Nonlinear Inference Regions

I would like to experiment with nonlinear inference regions (following
chap. 6 of the Bates/Watts book).

I have used the nls library for fitting a nonlinear model to measured data
but have some difficulties to apply "R speak" to the math of the above mentioned
text.

Can anybody point me to an example of the computation of a variant of nonlinear
inference regions using R? 


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Thomas Hoffmann, Institut fuer Halbleiter- und Mikrosystemtechnik, TU Dresden 
E-mail: hoffmann at ehmgs2.et.tu-dresden.de
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