Turbulence injection timescale (or timescale of massive star formation) compared to turbulence dissipation timescale in dwarf galaxies for different Kennicutt-Schmidt relations as a function of the star formation surface density. We adopt here a reference case with N = 1.5 as well as two additional cases with N = 1 and N = 2. The size of the star-forming region is assumed to be 0.5 kpc, the rotational velocity 40 km s^-1. We find that the critical star formation surface density has no strong dependence on the precise form of the Kennicutt-Schmidt relation.