%0 Journal Article %A Fjaer, E. %T Theoretical modelling of the impact of free gas on seismic velocities %D 1990 %J , %V %@ 2214-4609 %C cp-53-00049 %R https://doi.org/10.3997/2214-4609.201411896 %I European Association of Geoscientists & Engineers, %X %U https://www.earthdoc.org/content/papers/10.3997/2214-4609.201411896