@misc{Sokołowski_Jan_Recovering_2010,
 author={Sokołowski, Jan and Żochowski, Antoni},
 copyright={Creative Commons Attribution BY 4.0 license},
 address={Warszawa},
 journal={Raport Badawczy = Research Report},
 howpublished={online},
 year={2010},
 publisher={Instytut Badań Systemowych. Polska Akademia Nauk},
 publisher={Systems Research Institute. Polish Academy of Sciences},
 language={eng},
 abstract={The article presents an approach to the evaluation of the topological derivative for the energy type functional. The approach is based on the representation of the energy functional in the form of a minimization procedure for regularly perturbed quadratic functional. It is of some importance for the variational inequalities because it allows to derive the formulae for the topological derivatives which coincide with the formulae obtained for the corresponding liner boundary value problems.},
 title={Recovering gradients from surface integrals and applications},
 type={Text},
 URL={http://rcin.org.pl/Content/110583/PDF/RB-2010-23.pdf},
 keywords={Steklov–poincaré operators},
}