Tvorchestvo Nikolai︠a︡ Tikhonova : issledovanii︠a︡ i soobshchenii︠a︡. vstrechi s Tikhonovym. Bibliografii︠a︡ /
Kovalev, Valentin Arkhipovich.
Shoshin, Vladislav Andreevich.
Leningrad :  Nauka, 
1973.
Tikhonov, Nikolaĭ Semenovich.