Demidov, Sergeĭ S. 2021. “Nikolai Nikolaevich Luzin at the Crossroads of the Dramatic Events of the European History of the First Half of the 20th Century”. Studia Historiae Scientiarum 20 (September):317-35. https://doi.org/10.4467/2543702XSHS.21.012.14043.