@article{CHEB_2018_19_2_a1,
     author = {M. G. Bashmakova and E. S. Zolotukhina},
     title = {On estimate of irrationality measure of the numbers $\sqrt{4k+3}\ln{\frac{\sqrt{4k+3}+1}{\sqrt{4k+3}-1}}$ and $\frac{1}{\sqrt{k}}\mathrm{arctg}\,{\frac{1}{\sqrt{k}}}$},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {15--29},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2018_19_2_a1/}
}