Open Physics
Open Physics > 2004 > 2 > 1 > 104-119
Open Physics > 2005 > 3 > 3 > 395-408
Open Physics > 2008 > 6 > 2 > 289-295
Open Physics > 2008 > 6 > 3 > 450-453
Open Physics > 2008 > 6 > 4 > 843-848
Open Physics > 2010 > 8 > 4 > 639-642
Open Physics > 2013 > 11 > 2 > 213-218
Open Physics > 2014 > 12 > 12 > 851-861