Hydrogels in Biology and Medicine: From Molecular Principles to Bionanotechnology Peppas, N. A. ; Hilt, J. Z. ; Khademhosseini, A. ; Langer, R. Abstract Publication: Advanced Materials Pub Date: June 2006 DOI: 10.1002/adma.200501612 Bibcode: 2006AdM....18.1345P