Open Physics
Open Physics > 2012 > 10 > 2 > 514-518
Open Physics > 2012 > 10 > 4 > 995-1001
Open Physics > 2012 > 10 > 4 > 977-982
Open Physics > 2012 > 10 > 2 > 514-518
Open Physics > 2012 > 10 > 4 > 995-1001
Open Physics > 2012 > 10 > 4 > 977-982