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A Hamiltonian formulation of the Einstein-Cartan-Sciama-Kibble theory of gravity Kazimierz FranckiewiczWiktor Szczyrba OriginalPaper Pages: 31 - 42
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The Markoff property of the free Euclidean electromagnetic field J. Löffelholz OriginalPaper Pages: 57 - 61
On the permutability of Bäcklund transformations: 1 infinitesimal Bäcklund transformations of the sine-Gordon equation Tu Gui-Zhang OriginalPaper Pages: 63 - 71