Aleksandr Blok : issledovani︠i︡a i materialy - Gerasimov, ︠I︡U. (︠I︡Uriĭ); Gr︠i︡akalova, Natali︠i︡a ︠I︡Urʹevna; Lavrov, A. V. ("Nauka," Leningradskoe otd-nie, 1991)