%0 Journal Article
%A D. E. Apushkinskaya
%A A. I. Nazarov
%T The normal derivative lemma and surrounding issues
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 2022
%P 189-249
%V 77
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_2022_77_2_a0/
%G en
%F RM_2022_77_2_a0