This is a known issue for some people. There is probably a conflict between some of the libraries bibbase uses and the ones you are already using on your page. It's best in those cases to just hide those dropdowns using CSS:
#bibbase_header { display: none;}
Сервис поддержки клиентов работает на платформе UserEcho
This is a known issue for some people. There is probably a conflict between some of the libraries bibbase uses and the ones you are already using on your page. It's best in those cases to just hide those dropdowns using CSS: