Question: Who was the author of around 180 articles on mathematics, Mikhail Kravchuk or Georgy Voronoy?

Context paragraphs:
Helgi Valdimarsson: Helgi Valdimarsson (born 1936), is a professor of Immunology at the University of Iceland.  He established the first Immunology laboratory of Iceland in 1983.  He was a senior lecturer at St Mary's Hospital Medical school, London, England from 1975–1981 and a visiting Professor at St. Mary’s from 1981–1990.  He has published over 180 articles in international peer reviewed journals, and for his work on psoriasis he has received several research grants including European Commission Grant (1998–2002) and a Fogarty Scholarship in 2003.

Enrique Leff: Enrique Leff (born Mexico, 1946) is a Mexican economist, who defines himself today as an environmental sociologist and environmentalist.  He has written 25 books and 180 articles on political ecology, environmental sociology, environmental economics, environmental epistemology and environmental education.  He is regarded as one of the key environmental thinkers in Latin America.

Ivan Ivanov (mathematician): Ivan Ivanovich Ivanov (Russian: Иван Иванович Иванов ; 11 August 1862 – 17 December 1939) was a Russian-Soviet mathematician who worked in the field of number theory.  Together with Georgy Voronoy he continued Pafnuty Chebyshev's work on the subject.

Mikhail Kravchuk (footballer): Mikhail Kravchuk (Belarusian: Мiхаiл Краўчук ; Russian: Михаил Кравчук ; born 19 September 1991) is a Belarusian professional football player currently playing for Luch Minsk.

Robert Kravchuk: Robert Sacha Kravchuk (born July 4, 1955, Stamford, Connecticut) is an American scholar known in the fields of public administration and public finances, as well as because of his expertise on Ukraine.  He is the current director of the Master of Public Affairs program at the Indiana University School of Public and Environmental Affairs.  Kravchuk is a fellow of the National Academy of Public Administration.  As an author, he is held in libraries worldwide.

Georgy Voronoy: Georgy Feodosevich Voronoy (Ukrainian: Георгій Феодосійович Вороний ; Russian: Гео́ргий Феодо́сьевич Вороно́й ; 28 April 1868 – 20 November 1908) was a Russian and Ukrainian mathematician.  Among other things, he defined the Voronoi diagram.

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.

Voronoi formula: In mathematics, a Voronoi formula is an equality involving Fourier coefficients of automorphic forms, with the coefficients twisted by additive characters on either side.  It can be regarded as a Poisson summation formula for non-abelian groups.  The Voronoi (summation) formula for GL(2) has long been a standard tool for studying analytic properties of automorphic forms and their "L"-functions.  There have been numerous results coming out the Voronoi formula on GL(2).  The concept is named after Georgy Voronoy.

Idit Keidar: Idit Keidar (Hebrew: עדית קידר‎ ‎ ) is a professor of electrical engineering and an author of more than 180 articles which gave her an h-index of 38 and were cited more than 5,000 times.  Some of them were published in such journals as "Journal of Parallel and Distributed Computing" and "SIAM Journal on Computing".

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.

Supporting paragraphs: Mikhail Kravchuk Georgy Voronoy
Answer: Mykhailo Pylypovych Kravchuk