NotmanOlgaV.Country: RussiaCompany: Ural Federal University named after the first President of Russia B. N. Yeltsin, 19 Mira street, Kirovsky district, Vtuzgorodok microdistrict, YekaterinburgE-mail: o.v.notman@urfu.ru Author's articles The conceptualization of “megacity”: Formal-quantitative, legal, functional and systemic approaches