[2019-02-02]. (原始内容存档于2008-02-14). Ural State Technical University was given the name of Boris Yeltsin. [2022-09-04]. (原始内容存档于2023-02-09). Opening Yeltsin Center
Oxford Advanced Learner's Dictionary. [2020-08-11]. (原始内容存档于2019-09-13). a namegiven to a person who believes that the UK should remain in the European Union
BBC. 1988-08-17 [2010-02-20]. (原始内容存档于2011-05-20). Mulholland, Hélène. Boris Johnson mulls 'intelligent' congestion charge system for London. The Guardian