 As van Dalen notes, it is not known whether Kolmogorov sent his paper to Brouwer (van Dalen 2005: 555). The contents of the paper seem to have remained largely unknown outside the Soviet Union for years. Glivenko mentioned the paper in a letter to Heyting of October 13, 1928, as did Kolmogorov in an undated letter to Heyting of 1933 or later (Troelstra 1990: 16); but in Heyting 1934 it is, unlike Kolmogorov’s later paper from 1932, neither discussed nor included in the bibliography. The volume of the Jahrbuch über die Fortschritte der Mathematik covering 1925, which included a very short notice on Kolmogorov 1925 by V. Smirnov (Leningrad), wasn’t actually published until 1932 (Smirnov 1925).