May 2 (SeeNews) - The main equity indices of the Bulgarian Stock Exchange (BSE) started the trading week mixed on Wednesday, amid gains in Doverie United Holding [BUL:DUH] and Sopharma [BUL:SFA] along with losses in Sirma Group Holding [BUL:SGH] and Chimimport [BUL:CHIM], bourse data showed.