@misc{2019-application-tsort,
 day = {12},
 kind = {application},
 month = jul,
 note = {rev 5drSgzTbR3rTbyZkcT8Pfjq9fSrDef},
 title = {tsort},
 version = {rev 5drSgzTbR3rTbyZkcT8Pfjq9fSrDef},
 year = {2019}
}