@article{VMUMM_2012_1_a3,
     author = {A. A. Polyanskii},
     title = {Square exponent of irrationality of $\ln 2$},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {25--30},
     year = {2012},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2012_1_a3/}
}