Philipp et al, Three Methods for In Situ Cross-Linking of Polyvinyl Alcohol Films for Application as Ion-Conducting Membranes in Potassium Hydroxide Electrolyte, Apr. 1979, pp. 3-4, NASA Technical Paper 1407. |
Philipp et al, New Ion Exchange Membranes, Oct. 5-10, 1980, pp. 1 and 7; NASA Technical Memorandum 81670. |
Philipp et al, Kinetics of Copper Ion Absorption by Cross-Linked Calcium Polyacrylate Membranes Feb. 1983, p. 2, NASA Technical Memorandum 83052. |
Philipp et al, Ion Exchange Selectivity for Cross-Linked Polyacrylic Acid, Sep. 1983, NASA Technical Memorandum 83427. |