Gao, C. Y., Leporatti, S., Donath, E., & Möhwald, H. (2000). Surface texture of poly(styrenesulfonate sodium salt) and poly(diallyldimethylammonium chloride) micron-sized multilayer capsules: A scanning force and confocal microscopy study. The Journal of Physical Chemistry B, 104, 7144-7149. doi:10.1021/jp000615i.