Official website of Deutsche Börse Group: information on the company, listing, trading as professional and private investor, information services, technology.www.deutsche-boerse.com - 2021-11-04
U.S. Securities and Exchange Commission: official Federal Agency website, including news, legal and other releases and reports, investor education material, and the EDGAR database of corporate disclosure reports.www.sec.gov - 2021-11-03
London Stock Exchange: stock prices, charts, indexes, up to date news, listed companies, at the heart of the global financial market.www.londonstockexchange.com - 2021-11-02