Some more intriguing details from here:

https://hal.archives-ouvertes.fr/hal-02280296/document
«Finally, the trajectory of Vladimir Bernstein (1900-1936) constitutes another singular case, described in

detail in Finzi (1936). Born in 1900 in St. Petersburg, Bernstein entered the local university when he

was 17 to specialize in mathematics and became close to Yakov Viktorovich Uspensky (1883-1947).27

Taking advantage of the proximity of the border, he decided to emigrate during the winter of 1919 by

reaching Vyborg on the other side of the Gulf of Finland. Unfortunately, he was seriously wounded by

bullet before arriving there, and he never fully recovered from this injury that led to his premature death

in 1936. Arrived in France in the mid-1920s after a stay in London, he entered the Sorbonne and in 1930

defended a PhD on the singularities of Dirichlet series, dedicated to ‘his master Paul Montel’. The

lectures that Vladimir Bernstein presented at the Collège de France that same year on Dirichlet series

were published in 1933 in the Borel series of monographs on the theory of functions as Bernstein

(1933). The book was introduced by a very laudatory preface by Hadamard. It was in Italy, however,

that Bernstein decided to settle down (he had already published several papers in Italian journals). He

obtained Italian citizenship in 1931 and was responsible for teaching superior analysis in Milan and

analytical geometry in Pavia.»