Modelling of Natural Convection Flows with Large Temperature Differences: A Benchmark Problem for Low Mach Number Solvers. Part 1. Reference SolutionsPatrick Le Quéré, Catherine Weisman, Henri Paillère, Jan Vierendeels, Erik Dick, Roland Becker, Malte Braack and James LockeESAIM: M2AN, 39 3 (2005) 609-616DOI: https://doi.org/10.1051/m2an:2005027