By Lefteris Papadimas and Renee Maltezou ATHENS (Reuters) - A referendum on bailout terms that has morphed into a plebiscite on Greece's future in Europe has created the first real splits in Prime Minister Alexis Tsipras' ruling coalition. Four members of the right-wing Independent Greeks, uneasy bedfellows whose 13 votes Tsipras' left-wing Syriza party needs for a majority, defied him in the space of 24 hours by urging Greeks to accept more austerity in return for cash. With banks shut and Greeks queuing at cash machines for a meagre 60 euros a day, the dissenters made clear they felt Tsipras was courting a disastrous exit from the euro zone by calling for a 'No' vote.