ESR spectroscopy as a probe of the morphology of hydrogels Pitt, C. G. ; Wang, J. ; Chignell, C. F. ; Sik, R. Abstract Publication: Journal of Polymer Science B Polymer Physics Pub Date: August 1992 DOI: 10.1002/polb.1992.090300914 Bibcode: 1992JPoSB..30.1069P