Sovetska︠i︡a istoriografi︠i︡a sibirskoĭ narodnicheskoĭ ssylki, 70-e-seredina 90-kh godov XIX v. - Ushakova, L. A. (L︠i︡udmila Aleksandrovna) (Izd-vo "Nauka," Sibirskoe otd-nie, 1985)