51![](https://www.pdfsearch.io/img/b5eccd6960fbf5af8e3d0c33794b91d3.jpg) | Add to Reading ListSource URL: www.nasonline.orgLanguage: English - Date: 2012-10-24 13:17:05
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52![](https://www.pdfsearch.io/img/cbf61922901ec0a651c5243f68ee7dcf.jpg) | Add to Reading ListSource URL: arxiv.orgLanguage: English - Date: 2007-01-29 20:22:00
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53![](https://www.pdfsearch.io/img/81a3260c265e6718c85bd847be517dd0.jpg) | Add to Reading ListSource URL: www.liv.ac.ukLanguage: English - Date: 2006-10-03 10:04:03
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54![](https://www.pdfsearch.io/img/52538d4c9c6e91c0dc9a87cb7050e2eb.jpg) | Add to Reading ListSource URL: www.liv.ac.ukLanguage: English - Date: 2005-09-26 05:22:27
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55![](https://www.pdfsearch.io/img/f15554f5229a31a3945f3d129c0bb1a9.jpg) | Add to Reading ListSource URL: sirl.stanford.eduLanguage: English - Date: 2007-01-09 22:59:48
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56![](https://www.pdfsearch.io/img/d5178a05e3b7211f0764a37a2655859a.jpg) | Add to Reading ListSource URL: www.physnet.orgLanguage: English - Date: 2012-03-14 11:43:59
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57![](https://www.pdfsearch.io/img/5bd0776fdb257eb1628ae5591d5ef636.jpg) | Add to Reading ListSource URL: research.microsoft.comLanguage: English - Date: 2008-11-19 07:24:09
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58![](https://www.pdfsearch.io/img/d001b20f066887f25742e21af6739f08.jpg) | Add to Reading ListSource URL: books.nap.eduLanguage: English - Date: 2007-09-21 12:26:26
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59![](https://www.pdfsearch.io/img/8f258bc3c812215a3d7b539defec3837.jpg) | Add to Reading ListSource URL: arxiv.orgLanguage: English - Date: 2007-01-29 19:45:07
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