@article{DE_1998_34_11_a15,
     author = {A. P. Abramov},
     title = {Nonregular points in a certain model of ``gray'' economy},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1557--1558},
     publisher = {mathdoc},
     volume = {34},
     number = {11},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1998_34_11_a15/}
}