Orenburgskī︠i︡a pisʹma dl︠i︡a zhela︠i︡ushchikh oznakomitʹs︠i︡a s Orenburgom, Orskom, Troi︠t︡skom, fortom Aleksandrovskim i dorogo︠i︡u chrez kirgizsku︠i︡u stepʹ do forta no. 1 - Mikhaĭlov, M. (Russian history and culture, 1866)