[1] E. A. Barbashin, Lyapunov Functions, Nauka, Moscow, 1970.
[2] L. Hatvani, Alekszandr Ljapunov, aki rendet csinált a stabilitáselméletben (in Hungarian) [Aleksandr Lyapunov, who has put stability theory in order], Magyar Tudomány, 180 (2019) 255–265. https://doi.org/10.1556/2065.180.2019.1.10.
[3] A. M. Lyapunov, Collected works, (in Russian), Academy of Sciences of Soviet Union, Moscow, 1948.
[4] A. M. Lyapunov, Lectures in theoretical mechanics, (in Russian), Naukova Dumka, Kiev, 1982.
[5] Y. Sinai, Russian mathematicians in the 20th century, World Scientific, New Jersey, 2003. https://doi.org/10.1142/4499;Zbl1079.01023.
)