https://ebookmela.co.in/items/pi_dec_1t 2017-03-05T02:25:50.000Z weekly 0.8 https://ebookmela.co.in/items/pi_hex_1b 2017-03-08T08:31:11.000Z weekly 0.8 https://ebookmela.co.in/items/arxiv-physics0510165 2013-09-23T22:58:04.000Z weekly 0.8 https://ebookmela.co.in/items/arxiv-0901.3422 2013-09-21T23:33:45.000Z weekly 0.8 https://ebookmela.co.in/items/arxiv-hep-ph0604156 2013-07-20T06:43:53.000Z weekly 0.8