Iran's President Hassan Rouhani said on Thursday that members of OPEC should work together to secure implementation of a deal reached last month aimed at stabilizing the oil market, Iran's state TV reported. 'Close cooperation among OPEC and non-OPEC countries is key to stabilizing the oil prices and their increase,' Rouhani said in a telephone conversation with Venezuela's President Nicolas Maduro, according to Iran's state TV. 'It will pave the way for implementation of deals reached during meetings in Algiers and Vienna this year.'