<div class="ss-art-subcol"> </div><p class="ss-text-bold">Lewis Hamilton could yet be crowned world champion after Brazilian Grand Prix stewards summoned representatives of BMW Sauber and Williams for alleged technical irregularities. </p> </p> </p> A BMW spokeswoman told Reuters that the investigation concerned fuel temperatures. </p> </p> Williams driver Nico Rosberg finished fourth, with BMW Sauber's Robert Kubica and Nick Heidfeld fifth and sixth respectively. </p> </p> Should they be disqualified, Hamilton would be promoted to fourth place, enough to see him crowned as world champion. </p> </p> Kimi Raikkonen won the race and, should the orginal result stand, claimed the world title by one point from both Hamilton and his McLaren team-mate Fernando Alonso. </p> </p> More to follow...</p>