Question: Between Mikhail Kravchuk and Efim Zelmanov who wrote more articles on mathematics? 
Sentence (from "Mikhail Kravchuk"): Mykhailo Pylypovych Kravchuk, also Krawtchouk (Ukrainian: Миха́йло Пили́пович Кравчу́к ) (September 27, 1892 – March 9, 1942), was a Soviet Ukrainian mathematician who, despite his early death, was the author of around 180 articles on mathematics.
Relevant evidence: Yes