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Theoretical and Mathematical Physics > 2016 > 189 > 3 > 1806-1817
Central European Journal of Physics > 2009 > 7 > 3 > 584-590
Theoretical and Mathematical Physics > 2004 > 138 > 1 > 107-117
Theoretical and Mathematical Physics > 2016 > 189 > 3 > 1806-1817
Central European Journal of Physics > 2009 > 7 > 3 > 584-590
Theoretical and Mathematical Physics > 2004 > 138 > 1 > 107-117