@misc{2019-application-tsort,
 day = {3},
 kind = {application},
 month = jul,
 note = {rev 5du4P1b64FcsF1ceP2HuEgX26zMYcR},
 title = {tsort},
 version = {rev 5du4P1b64FcsF1ceP2HuEgX26zMYcR},
 year = {2019}
}