We present a simple way for calculating confidence intervals for a class of scalar functions of the parameters in least squares estimation when there are linear together with a small number of non-linear terms. We do not assume normality.
"Confidence intervals in a regression with both linear and non-linear terms." Electron. J. Statist. 5 603 - 618, 2011. https://doi.org/10.1214/11-EJS620