https://dds.las.ac.cn/service/document?appId=a1vacbnPuv9qJRzJvdNXfsesj9JbIa6e&appKey=sPBA4vANLzjnW1k5eufEcc4k7dxfNraW&ts=1763029819717&signature=996f0dc7915975769c14cb610c8d5792&articleTitle=Vertebrate+Flight&articleAuthor=Ulla+M.+Norberg&publicationTitle=Vertebrate+Flight&language=&publicationType=1&publishYear=1990&isn=9783540513704&publisher=Springer+Berlin+Heidelberg