Unsal, Mithat & /SLAC /Stanford U., Phys. Dept. Magnetic Bion Condensation: A New Mechanism ofConfinement and Mass Gap in Four Dimensions, article, September 25, 2007; (https://digital.library.unt.edu/ark:/67531/metadc884887/m1/1/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .