Bjørn Tronstad | Bjørn Dæhlie | Bjørn Rune Gjelsten | Bjørn Einar Romøren | Bjørn Wirkola | On ''Spirit of Norway 10'' with Bjørn Rune Gjelsten | Bjørn Ousland | Bjørn Kruse | Bjørn Kjos | Bjørn Jarle Rødberg Larsen | Bjørn Jacobsen | Bjørn Grinde | Andreas Bjørn |
Bjørn Alterhaug (1991), Kjell Öhman (1993), with Jan Gunnar Hoff Group (1992–), Sigurd Ulveseth Trio (1993–), «Radiostorbandet» (1971–90), a big band led by Helge Hurum, Jens Wendelboe, Kjell Karlsen and Fred Nøddelund.
His first record Notice (Odin Records, 1981), with Henning Gravrok (saxophones), Bjørn Alterhaug (bass), Terje Bjørklund (piano) and Ernst-Wiggo Sandbakk (drums), all musicians from Northern Norway.
Sommerro has since that time performed on his own, with various groups, and as an accompanist for, among others, Erik Bye, Sigmund Groven, Geirr Lystrup, Halvdan Sivertsen, Bjørn Alterhaug, Dalakopa, Arve Tellefsen, John Pål Inderberg, Palle Mikkelborg, Åge Aleksandersen, Arne Domnerus, Aly Bain, and Choeur Grégorien de Paris.