By the time Korni Grupa disbanded, other Serbian progressive rock bands, like YU Grupa and Smak, had already achieved huge mainstream popularity. YU Grupa, formed in 1970 by former Džentlmeni members, brothers Dragi and Žika Jelić, is often considered the longest-lasting Serbian rock band. Having released several successful singles which featured a fusion of progressive/hard rock and Balkan traditional music, YU Grupa released their first album, "YU Grupa" (1973), which became one of the best selling Yugoslav rock albums of the 1970s. The band continued to release successful albums, but with the popularity of new wave, the band disbanded in 1981. However, the band reunited in 1987 and has released a number of well-accepted hard rock-oriented albums since. The band Smak from Kragujevac, formed by guitar virtuoso Radomir Mihailović "Točak" in 1971, was, during the second half of the 1970s, competitive with the band Bijelo Dugme from Sarajevo. Smak released several hit singles before releasing their self-titled debut in 1975, considered to be one of the most successful debut albums in former Yugoslavia. The band's later releases, "Satelit" (1976), "Crna dama" (1977) and "Stranice našeg vremena" (1978), saw similar success, but the band disbanded in 1981 for the similar reasons like YU Grupa. The band reunited and disbanded several more times during the 1980s and 1990s, releasing albums that saw little commercial success, although the 2012 reunion of the band's default lineup saw large interest by the audience and covering in the media.