<?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%">Hongwei Xu</style></author><author><style face="normal" font="default" size="100%">Xiaochuan Zhou</style></author><author><style face="normal" font="default" size="100%">Guichang Xu</style></author><author><style face="normal" font="default" size="100%">Quangang Du</style></author><author><style face="normal" font="default" size="100%">Enge Wang</style></author><author><style face="normal" font="default" size="100%">Dingsheng Wang</style></author><author><style face="normal" font="default" size="100%">Lingjun Zhang</style></author><author><style face="normal" font="default" size="100%">Chenjia Chen</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Photoreflectance study of AlAs/GaAs gradient period superlattice</style></title><secondary-title><style face="normal" font="default" size="100%">Applied Physics Letters</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1992</style></year></dates><pages><style face="normal" font="default" size="100%">2193-2195</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">18</style></issue></record></records></xml>