%0 Journal Article
%A M. G. Bashmakova
%A V. Kh. Salikhov
%T On irrationality measure $\mathop{\mathrm{arctg}}\frac{1}{2}$
%J Čebyševskij sbornik
%D 2019
%P 58-68
%V 20
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CHEB_2019_20_4_a4/
%G ru
%F CHEB_2019_20_4_a4