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References

1. Block, Eric (2010) (in en). Garlic and Other Alliums: The Lore and the Science. Royal Society of Chemistry. ISBN 9780854041909. https://books.google.de/books?id=6AB89RHV9ucC&pg=PA47&lpg=PA47&dq=Such+a+dome+is+larger+in+diameter+than+the+drum+it+is+set+upon+and+its+height&source=bl&ots=wuDj1u3rSp&sig=vl0CAr2zuKBSroJ3gQaID1vMUcY&hl=de&sa=X&ved=2ahUKEwj22c2w9KjfAhULzqQKHcR-DFEQ6AEwAHoECAkQAQ#v=onepage&q&f=false. 
2. Shvidkovsky, D. S. (2007). Russian architecture and the West. Yale University Press. ISBN 978-0-300-10912-2. https://books.google.com/?id=LQy9TJ2yOQEC. 
3. Bridge, Nicole (2015). Architecture 101: An Essential Guide to Building Styles and Materials. Avon, MA: Adams Media. pp. 88. ISBN 978-1-4405-9007-8. 
4. A.П.Новицкий. Луковичная форма глав русских церквей. В кн.: Московское археологическое общество. Труды комиссии по сохранению древних памятников. Т. III. Moscow, 1909.
5. Б.А.Рыбаков. «Окна в исчезнувший мир (по поводу книги А.В.Арциховского «Древнерусские миниатюры как исторический источник»). В кн.: Доклады и сообщения историч. факультета МГУ. Вып. IV. М., 1946. С. 50.
6. Н.Н.Воронин. Архитектурный памятник как исторический источник (заметки к постановке вопроса). В кн.: Советская археология. Вып. XIX. М., 1954. С. 73.
7. S. V. Zagraevsky. Forms of the domes of the ancient Russian temples. Published in Russian: Заграевский С.В. Формы глав (купольных покрытий) древнерусских храмов. М.: Алев-В, 2008. http://zagraevsky.com/glavi_engl.htm
8. Г.К.Вагнер. О своеобразии стилеобразования в архитектуре Древней Руси (возвращение к проблеме). В кн.: Архитектурное наследство. Вып. 38. М., 1995. С. 25.
9. See, for instance, the most authoritative survey of early Russian architecture: П.А.Раппопорт. Древнерусская архитектура. СПб, 1993.
10. Another important consideration proposed by Zagraevsky links the onion-shaped form of Russian domes with the weight of traditional Russian crosses, which are much larger and more elaborate than those used in Byzantium and Kievan Rus. Such ponderous crosses would have fallen aground during a storm, if they had not been fixed to sizeable stones traditionally placed inside the elongated domes of Russian churches. It is impossible to place such a stone inside the flat dome of the Byzantine type.
11. Бусева-Давыдова И.Л. Символика архитектуры по древнерусским письменным источникам XI-XVII вв. // Герменевтика древнерусской литературы. XVI - начало XVIII вв. Moscow, 1989.
12. "The Byzantine cupola above the church represents the vault of heaven above the earth. On the other hand, the Gothic spire expresses unbridled vertical thrust, which rises huge masses of stone to the sky. In contrast to these, our native onion dome may be likened to a tongue of fire, crowned by a cross and tapering towards a cross. When we look at the Ivan the Great Bell Tower, we seem to see a gigantic candle burning above Moscow. The Kremlin cathedrals and churches, with their multiple domes, look like huge chandeliers. The onion shape results from the idea of prayer as a soul burning towards heaven, which connects the earthly world with the treasures of the afterlife. Every attempt to explain the onion shape of our church domes by utilitarian considerations (for instance, the need to preclude snow from piling on the roof) fails to account for the most essential point, that of aesthetic significance of onion domes for our religion. Indeed, there are numerous other ways to achieve the same utilitarian result, e.g., spires, steeples, cones. Why, of all these shapes, ancient Russian architecture settled upon the onion dome? Because the aesthetic impression produced by the onion dome matched a certain religious attitude. The meaning of this religious and aesthetic feeling is finely expressed by a folk saying - "glowing with fervour" - when they speak about church domes". - See Е.Н.Трубецкой. Три очерка о русской иконе. 1917. Новосибирск, 1991. С. 10.
13. Лидов А.М. Иерусалимский кувуклий. О происхождении луковичных глав. // Иконография архитектуры. Moscow, 1990.