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Open Physics > 2012 > 10 > 1 > 210-217
Open Physics > 2012 > 10 > 1 > 210-217
Open Physics > 2003 > 1 > 3 > 421-431
Open Physics > 2003 > 1 > 3 > 421-431
Open Physics > 2012 > 10 > 1 > 210-217
Open Physics > 2012 > 10 > 1 > 210-217
Open Physics > 2003 > 1 > 3 > 421-431
Open Physics > 2003 > 1 > 3 > 421-431