Reference needed for the surface tension coupling scheme used in Gromacs

GROMACS version: any
GROMACS modification: No
Dear sirs,
Can you provide a reference for the surface tension coupling scheme described in the manual ? There is none in the manual itself.

Thanks in advance

I don’t think that there is a GROMACS paper that desribes this. But it is so straightforward that a reference is not really needed. It is the same as anistropic coupling, but then the x and y dimensions are scaled by the same factor, or have the same velocity in PR-coupling, as with isotropic coupling.