B.T.R. is a Bulgarian rock band. Founded during 1984 in Sofia, Bulgaria by group members Atanas Penev - Nasko (Vocals), Slavcho Nickoloff (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 during 1993. The album was found with lots 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.