Bifurcation and chaos in zero-Prandtl-number convection P. Pal, P. Wahi, S. Paul, M. K. Verma, K. Kumar and P. K. Mishra EPL, 87 5 (2009) 54003 Published online: 22 September 2009 DOI: 10.1209/0295-5075/87/54003