Steimke, J.; Steeper, T.; Herman, D.; Colon-Mercado, H. & Elvington, M. METHOD TO PREVENT SULFUR ACCUMULATION INSIDE MEMBRANE ELECTRODE ASSEMBLY, report, June 22, 2009; (https://digital.library.unt.edu/ark:/67531/metadc932655/m1/1/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .