BANJA LUKA (Bosnia and Herzegovina), May 24 (SeeNews) – Bosnia’s Banja Luka bourse said on Tuesday it has included alumina plant Birac [BANJ:BIRA-R-A], chemicals producer Hemijska Industrija Destilacija [BANJ:DEST-R-A] and brewer Banjalucka Pivara [BANJ:BLPV-R-A] in its BIRS index of 20 companies with the biggest market capitalisation.