%0 Journal Article
%A A. N. Bobrov
%T Letter to the editors: ``The trace of the Laplace-Beltrami operator with a potential on a Zoll surface'' [Differ. Uravn. \textbf{35} (1999), no. 4, 528--539, 575; MR1719784]
%J Differencialʹnye uravneniâ
%D 1999
%P 1713
%V 35
%N 12
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1999_35_12_a16/
%G ru
%F DE_1999_35_12_a16