Open Physics
Open Physics > 2008 > 6 > 2 > 289-295
Open Physics > 2008 > 6 > 3 > 563-568
Open Physics > 2008 > 6 > 4 > 843-848
Open Physics > 2008 > 6 > 2 > 289-295
Open Physics > 2008 > 6 > 3 > 563-568
Open Physics > 2008 > 6 > 4 > 843-848