De Geest, B. G., Skirtach, A. G., De Beer, T. R. M., Sukhorukov, G. B., Bracke, L., Baeyens, W. R. G., et al. (2007). Stimuli-responsive multilayered hybrid nanoparticle/polyelectrolyte capsules. Macromolecular Rapid Communications, 28(1), 88-95. doi:10.1002/marc.200600631.