@article{VMUMM_1990_5_a5,
     author = {T. A. Leont'eva},
     title = {On the convexity of the domain of convergence of a series of generalized exponentials},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {28--32},
     publisher = {mathdoc},
     number = {5},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1990_5_a5/}
}