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Reports on Mathematical Physics > 2013 > 71 > 2 > 217-229
Journal of Molecular Structure: THEOCHEM > 2007 > 806 > 1-3 > 155-158
Open Physics > 2006 > 4 > 3 > 318-330
Open Physics > 2006 > 4 > 3 > 318-330
Open Physics > 2004 > 2 > 3 > 456-466
Open Physics > 2004 > 2 > 3 > 456-466