TY  - JOUR
AU  - M. G. Bashmakova
AU  - V. Kh. Salikhov
TI  - On irrationality measure $\mathop{\mathrm{arctg}}\frac{1}{2}$
JO  - Čebyševskij sbornik
PY  - 2019
SP  - 58
EP  - 68
VL  - 20
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CHEB_2019_20_4_a4/
LA  - ru
ID  - CHEB_2019_20_4_a4
ER  -