7Search.ccphysics letters a letpubphysics letters a letpubmodern physics letters a letpubchemical physics letters letpubapplied physics letters letpublaser physics letters letpubphysics review letter letpubchinese physics letters letpubthe physics teacher letpubphysics review a letpubletpub physical chemistry chemical physicsapplied physics a letpubreviews in physics letpub