B.T.R. is a Bulgarian rock band. Founded in 1984 by group members Atanas Penev - Nasko (Vocals), Slavcho Nickolov (Guitars), Ivan Kalfov (bass), and Georgy Milev as drummer, later replaced by Ilian Dikov. History The band's first album was "Feel the Life", released in 1993. The album had a lot of local success and the band even started some tours outside of the country. Bending The Rules was released the same year with lots of great tracks, such as Under the Law and First Blood.