BANJA LUKA (Bosnia and Herzegovina), July 31 (SeeNews) – Bosnian fuel retailer Nestro Petrol [BANJ:PTRL-R-A] said on Monday it swung to a net profit of 2.8 million marka ($1.68 million/1.43 million euro) in the first half of 2017 from 792,025 marka loss in the like period of last year.