Question: Between Mikhail Kravchuk and Efim Zelmanov who wrote more articles on mathematics? 
Sentence (from "Lutsk Gymnasium 21"): Lutsk Gymnasium #  21 after Mikhail Kravchuk  is an elementary (grades 1-4), middle (grades 5-9) and high (grades 10-11) school with the specialization in some subjects, determined yearly according to the students' and parents' wishes, recommendations of senior teachers and a stuff phycologist.
Relevant evidence: No