@misc{2017-library-Xi,
 day = {11},
 kind = {library},
 month = jul,
 note = {rev 5dt3Vcf2j3iSb2qF54hiUy9wLTXC3o},
 title = {Xi},
 version = {rev 5dt3Vcf2j3iSb2qF54hiUy9wLTXC3o},
 year = {2017}
}