Distribution and spread of bark beetles (Coleoptera, Scolytidae) around the Gulf of Finland: a comparative study with notes on rare species of Estonia, Finland and North-Western Russia - Vollma, K.; Mandelshtam, M.J.; Shcherbakov, A.N.; Yakovlev, E.B.; Öunap, H.; Süda, I.I.; Popopvichev, B.G.; Sharapa, T.V.; Galasjeva, T.V.; Khairetdinov, R.R.; Lipatkin, V.A.; Mosolevskaya, E.G.