<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Dong Sun</style></author><author><style face="normal" font="default" size="100%">Zong-Kwei Wu</style></author><author><style face="normal" font="default" size="100%">Charles Divin</style></author><author><style face="normal" font="default" size="100%">Xuebin Li</style></author><author><style face="normal" font="default" size="100%">Claire Berger</style></author><author><style face="normal" font="default" size="100%">Walt A. De Heer</style></author><author><style face="normal" font="default" size="100%">Phillip N. First</style></author><author><style face="normal" font="default" size="100%">Theodore B. Norris</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Ultrafast relaxation of excited dirac fermions in epitaxial graphene using optical differential transmission spectroscopy</style></title><secondary-title><style face="normal" font="default" size="100%">Physical Review Letters</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2008</style></year></dates><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">15</style></issue><custom7><style face="normal" font="default" size="100%">000259965000065</style></custom7></record></records></xml>