@article{IVM_1972_8_a13,
     author = {I. I. \`Eterman},
     title = {Rational $E_{n,m}(x)$ functions, and the approximation of~$|x|$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {114--119},
     publisher = {mathdoc},
     number = {8},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1972_8_a13/}
}