Open Physics
Open Physics > 2004 > 2 > 1 > 120-131
Open Physics > 2004 > 2 > 3 > 535-555
Open Physics > 2008 > 6 > 3 > 450-453
Open Physics > 2009 > 7 > 3 > 490-502
Open Physics > 2012 > 10 > 1 > 86-95
Open Physics > 2012 > 10 > 6 > 1311-1313
Open Physics > 2012 > 10 > 6 > 1267-1270