E.X.YULDASHOV B.B.AKBAROVA. BIRINCHI VA IKKINCHI SIGNAL TIZIMLARI FAOLIYATIDAGI FARQLAR. Miasto Przyszłości, [S. l.], v. 40, p. 281–284, 2023. Disponível em: https://miastoprzyszlosci.com.pl/index.php/mp/article/view/1812. Acesso em: 10 mar. 2025.