Kosor announced the joint session of the two governments after she met members of the tripartite Bosnian presidency, Haris Silajdzic and Zeljko Komsic in Sarajevo on Saturday during her working visit.
"This will certainly be a historic meeting of the two governments," Kosor said adding that she expected the settlement of some of the outstanding issues on that occasion.
Kosor told reporters that Silajdzic and Komsic had thanked Croatia for its support to Bosnia's efforts to be granted NATO Membership Action Plan and congratulated Zagreb on the ongoing anti-corruption drive.
She went on to say that the Croatian government and President Ivo Josipovic were protagonists of the policy of dialogue and bridge-building.
In her capacity as the Croatian Democratic Union (HDZ) president, Kosor held separate talks with leaders of the HDZ BiH and of the HDZ 1990, Dragan Covic and Bozo Ljubic respectively, in the building housing the Croatian Embassy in the Bosnian capital.
In her address to the press Kosor said the talks focused on the general elections in Bosnia, set for 3 October.
"We in the HDZ will certainly support all efforts of political parties in Bosnia-Herzegovina aimed at strengthening a single Bosnia-Herzegovina with the three constituent people and the same rights to everyone," Kosor said.
In response to the question whether she mediated between Covic and Ljubic in attempts to select a joint candidate of Croat parties for the future representative of the Croat people in the Bosnian presidency, Kosor said that it would be good to achieve agreement on the matter but that nothing would be imposed on those parties.
"We have come to make suggestions and help but we will in no way impose our positions and our opinions," said the head of the ruling Croatian party.
Commenting on different reactions among Bosnian Croat parties to the changes in the model for the election of Diaspora representatives to Croatia's parliament, Kosor said the changed model was an important agreement providing for the rights of Croatian nationals abroad to participate in the elections.
"We have settled a big issue which was permanently a matter of political upmanship in Croatia and I do not believe that it was good. Now this has been settled for good," the Croatian PM said.
After their separate talks with Kosor, the HDZ BiH leader Covic and the HDZ 1990 chief Ljubic confirmed their completely different positions which ruled out coalition ahead of the general elections.
Covic said that there was only one HDZ in Bosnia-Herzegovina and that the HDZ BiH would propose its candidate for the Bosnian presidency.
Ljubic said that he had been one of founders of the HDZ in Bosnia-Herzegovina in 1990 and that Covic joined the party not before than 1998.