Onset of Soret-induced convection in a horizontal layer of ternary fluid with fixed vertical heat flux at the boundariesT. P. Lyubimova, E. S. Sadilov and S. A. ProkopevEur. Phys. J. E, 40 2 (2017) 15DOI: https://doi.org/10.1140/epje/i2017-11505-9