Question: What famous encyclopedia contains a Russian back-transliteration of Estonian?
Sentence: Even in the Encyclopædia Britannica one can find "ostrov Khiuma", where "ostrov" means "island" in Russian and "Khiuma" is back-transliteration from Russian instead of "Hiiumaa" (Hiiumaa > Хийума(а) > Khiuma).
Answer in sentence: yes