1. Tropp, E. A. , Frenkel’, V. Ya. and Chernin, A. D. (1988). Aleksandr Aleksandrovich Fridman. Zhizn’ i deyatel’nost’ [Alexander Alexandrovich Friedman. Life and work]. Moscow: Nauka publ. 304 p. (In Russ.).
2. Tegmark, M. (2017). Our mathematical Universe [Russ. ed.:. Nasha matematicheskaya Vselennaya. V poiskakh fundamental’noi prirody real’nosti]. Moscow: AST: CORPUS publ. 592 p. (In Russ.).
3. Zel’dovich, Ya. B. (1963). Teoriya rasshiryayushcheisya Vselennoi, sozdannaya A.A. Fridmanom [The theory of the expanding Universe, created by A.A. Friedman]. Uspekhi Fizicheskikh Nauk. Vol. 80, issue 3. P. 357–390. (In Russ.).
4. Fridman, A. A. (1966). Izbrannye Trudy [Selected works]. Ed. by L. S. Polak. Moscow: Nauka publ. 463 p. (In Russ.).
5. Pamyati A. A. Fridmana (k 75-letiyu so dnya rozhdeniya) [In memory of A. A. Friedman (to the 75th anniversary of his birth)]. Uspekhi Fizicheskikh Nauk. Vol. 80, issue 3. P. 357–390. (In Russ.).