February 15 (SeeNews) - Croatian industrial group Djuro Djakovic Holding [ZSE:DDJH-R-A] said on Monday it has signed a 4.6 million kuna ($676,100/603,700 euro) contract with oil and gas company INA [ZSE:INA-R-A] for works on INA's oil refinery in the Adriatic port of Rijeka.