@book { Managingeconomicsystemswithincompetitivemarketspublishedinrussian,
    title = "Managing economic systems within competitive markets (published in russian)",
    author = "Valeriy {Karpov} and Sergey {Kondratyukov}",
    year = "2015",
    publisher = "Anchor Academic Publishing",
    address = "Hamburg, Germany",
    url = "https://m.anchor-publishing.com/document/312827"
}