https://www.vedomosti.ru/library/news/2009/01/12/dmedvedev-rossijsko-ukrainskij-memorandum-po-gazu-utratil-silu?utm_source=telegram&utm_campaign=share&utm_medium=social&utm_content=dmedvedev-rossijsko-ukrainskij-memorandum-po-gazu-utratil-silu