https://dds.las.ac.cn/service/document?appId=a1vacbnPuv9qJRzJvdNXfsesj9JbIa6e&appKey=sPBA4vANLzjnW1k5eufEcc4k7dxfNraW&ts=1763049457445&signature=fcbd088f956745071b511a4676d428b8&articleTitle=Electromagnetic+Theory+of+Gratings&articleAuthor=Roger+Petit&publicationTitle=Electromagnetic+Theory+of+Gratings&language=&publicationType=1&publishYear=1980&isn=9783642815027&publisher=Springer+Berlin+Heidelberg