You need a visa to come to Russia. Samara University can be attended with STUDY visa only. It is issued upon the invitation from Samara University. This invitation is made personally for you (it takes 30 working days) and is sent to your e-mail or post address.
The copy of the invitation will be sent to your e-mail.
Go to a Russian Embassy/Consulate with the invitation and all the documents needed for visa. The city of the Russian Embassy/Consulate will be stated in your invitation. Apply for visa in your country.