@article{RM_1987_42_2_a13,
     author = {V. A. Kulagin},
     title = {On~the algebraic independence of values of certain subclasses of $E$-functions},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {285--286},
     publisher = {mathdoc},
     volume = {42},
     number = {2},
     year = {1987},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1987_42_2_a13/}
}