%0 Journal Article %A Helbig, K. %T Determination of elastic constants pertaining to a symmetry plane of an orthorhombic medium under arbitrary overburden from three-component offset VSP measurements %D 1991 %J , %V %@ 2214-4609 %C cp-42-00263 %R https://doi.org/10.3997/2214-4609.201411005 %I European Association of Geoscientists & Engineers, %X %U https://www.earthdoc.org/content/papers/10.3997/2214-4609.201411005