Sure Luigi, this is done routinely by photographers specializing in interior architectural shots. The world expert on this is one Kirk Gittings; I remember an interesting discussion with him on this topic on LFPinfo. He may be on here from time to time.

The main technicality is that the exposures don't quite add intuitively, in a simple linear way; reciprocity failure is the culprit. But you can reduce the effect and work with it.