<?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%">Per Bak</style></author><author><style face="normal" font="default" size="100%">Chao Tang</style></author><author><style face="normal" font="default" size="100%">Kurt Wiesenfeld</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Comment on &quot;relaxation at the angle of repose&quot;</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%">1989</style></year></dates><pages><style face="normal" font="default" size="100%">110-</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">1</style></issue></record></records></xml>