https://dds.las.ac.cn/service/document?appId=a1vacbnPuv9qJRzJvdNXfsesj9JbIa6e&appKey=sPBA4vANLzjnW1k5eufEcc4k7dxfNraW&ts=1763013337743&signature=318af2e07e9b92627d7fc1f511a9d235&articleTitle=Nonlinear+Optics&articleAuthor=D.L.+Mills&publicationTitle=Nonlinear+Optics&language=&publicationType=1&publishYear=1998&isn=9783540641827&publisher=Springer+Berlin+Heidelberg