O. I. Vinogradova, O. V. Lebedeva, K. Vasilev, H. Gong, J. Garcia-Turiel, B. S. Kim, ‘‘Multilayer DNA/Poly (Allylamine Hydrochloride) Microcapsules: Assembly and Mechanical Properties’’, Biomacromolecules, 6(3), 1495-1502 (2005).