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IEEE Sensors Journal > 2009 > 9 > 7 > 814 - 819
IEEE Photonics Technology Letters > 2007 > 19 > 17 > 1313 - 1315
IEEE Sensors Journal > 2009 > 9 > 7 > 814 - 819
IEEE Photonics Technology Letters > 2007 > 19 > 17 > 1313 - 1315