Open Physics
Open Physics > 2008 > 6 > 4 > 802-807
Open Physics > 2010 > 8 > 3 > 432-437
Open Physics > 2010 > 8 > 5 > 833-842
Open Physics > 2011 > 9 > 2 > 515-518
Open Physics > 2013 > 11 > 9 > 1141-1148
Open Physics > 2008 > 6 > 4 > 802-807
Open Physics > 2010 > 8 > 3 > 432-437
Open Physics > 2010 > 8 > 5 > 833-842
Open Physics > 2011 > 9 > 2 > 515-518
Open Physics > 2013 > 11 > 9 > 1141-1148