@article{IVM_2019_1_a6,
     author = {V. Kh. Salikhov and M. G. Bashmakova},
     title = {On irrationality measure $\mathrm{arctg}\, \frac {1}{3}$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {69--75},
     publisher = {mathdoc},
     number = {1},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2019_1_a6/}
}