Not sure if it is the case here at all. But sometimes those old Soviet-bloc "original research" documents can be hard to find. An example of this elsewhere is the Levenshtein distance -- everybody knows what this is, but the actual original document was a Soviet-era journal:
Влади́мир И. Левенштейн (1965). Двоичные коды с исправлением выпадений, вставок и замещений символов [Binary codes capable of correcting deletions, insertions, and reversals]. Доклады Академий Наук СCCP (in Russian) 163 (4): 845–8. Appeared in English as: Levenshtein, Vladimir I. (February 1966). "Binary codes capable of correcting deletions, insertions, and reversals". Soviet Physics Doklady 10 (8): 707–710.
Given the productivity of Russian academics and the difficulty in obtaining a lot of these journals, has there been a concentrated effort to make these available for a modern, web-enabled audience?
Another possibility that occurred to me is that the subject matter of this particular paper is pretty unpleasant, perhaps any potential translators simply shied away from it.
