Project Objectives We are carrying out a multi-wavelength study of a sample of BCD galaxies, focussing in those aspects related to thir star-formation and evolution. We interested in: tracing the star-formation history characterisation of stellar populations measure the dynamic mass of these galaxies, which allow to determine the total stellar mass and dark matter mass. Look for signatures indicatives of possible merger or interaction phenomena that could be starting the star-formation process. Traditional spectroscopic techniques have proven to be limited and inefficient to study in detail this kind of obejcts. In fact, these studies are subject to some assumptions and error sources: We need to assume a homogeneous emission within each knot of star-formation We have also to assume that the extinction derived in that portion of the galaxy, sliced by the slit, is the same for the whole galaxy.