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Reeder 1989, p. 106. Reeder, Roberta (Winter 1989). "Puppets: Moving Sculpture". The Journal of Decorative and Propaganda Arts. 11 (2). University Park, Florida: Florida International University Board of Trustees on behalf of The Wolfsonian-FIU: 106–125. ISSN0888-7314. JSTOR1503985.
Reeder 1989, p. 111. Reeder, Roberta (Winter 1989). "Puppets: Moving Sculpture". The Journal of Decorative and Propaganda Arts. 11 (2). University Park, Florida: Florida International University Board of Trustees on behalf of The Wolfsonian-FIU: 106–125. ISSN0888-7314. JSTOR1503985.
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Руденко 2016. Руденко (Rudenko), Л. Л. (L. L.) (17 April 2016). ""Приятнейшая Тень" В России" ["Pleasant Shadow" in Russia]. Academy of Folk Art of Russia (in Russian). Moscow, Russia. Archived from the original on 21 March 2017. Retrieved 21 March 2017.
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Шмидт 2013. Шмидт (Schmidt), С. О. (S. O.), ed. (2013). "Ефимовы, супруги, художники. Одни из создателей отеч. профес. т-ра кукол" [Efimov, spouses, artists. Some of the creators of the fatherland. Prof. T-ra of dolls]. Лица Москвы Энциклопедия (Faces of Moscow Encyclopedia) (in Russian). Moscow, Russia: The government of Moscow by Moscow Textbooks and Carto-lithography. Archived from the original on 4 March 2016. Retrieved 25 March 2017.
Голицына 2005. Голицына (Golitsyn), И.И. (I. I.) (2005). "Нина Яковлевна Симонович-Ефимова (1877–1948)" [Nina Yakovlevna Simonovich-Efimova (1877–1948)]. Наше Наследие (Our Heritage) (in Russian) (73). Moscow, Russia. Archived from the original on 8 September 2016. Retrieved 21 March 2017.
Tver Gallery 2008. "История коллекции" [History of the collection]. Tver Gallery (in Russian). Tver, Russia: Тверская Областная Картинная Галерея. 2008. Archived from the original on 19 December 2016. Retrieved 21 March 2017.
Russell 1994, p. 4. Russell, Joel F. (May 1994). Gazetteer of Venusian Nomenclature(PDF) (Report). Reston, Virginia: Department of the Interior U.S. Geological Survey. Open-File Report 94-235. Archived from the original(PDF) on 2 March 2017.
Reeder 1989, p. 112. Reeder, Roberta (Winter 1989). "Puppets: Moving Sculpture". The Journal of Decorative and Propaganda Arts. 11 (2). University Park, Florida: Florida International University Board of Trustees on behalf of The Wolfsonian-FIU: 106–125. ISSN0888-7314. JSTOR1503985.
Ковычева 2014. Ковычева (Kovycheva), Елена Ивановна (Elena Ivanovna) (2014). "Условия Формирования Творческой Личности Художника-Реалиста Серебряного Века (На Примере Н. Я. Симонович-Ефимовой И И. С. Ефимова)" [Conditions for the Formation of the Creative Personality of the Artist-Realist of the Silver Age (On the Example of N. Ya. Simonovich-Efimova and I. S. Efimov)] (PDF). Исторические, философские, политические и юридические науки, культурология и искусствоведение. Вопросы теории и практики (Historical, philosophical, political and legal sciences, cultural studies and art history. Issues of theory and practice) (in Russian). 41 (3). Tambov, Russia: Издательства Грамота. ISSN1997-292X. Archived from the original(PDF) on 8 August 2014. Retrieved 21 March 2017.
Reeder 1989, p. 106. Reeder, Roberta (Winter 1989). "Puppets: Moving Sculpture". The Journal of Decorative and Propaganda Arts. 11 (2). University Park, Florida: Florida International University Board of Trustees on behalf of The Wolfsonian-FIU: 106–125. ISSN0888-7314. JSTOR1503985.
Reeder 1989, p. 111. Reeder, Roberta (Winter 1989). "Puppets: Moving Sculpture". The Journal of Decorative and Propaganda Arts. 11 (2). University Park, Florida: Florida International University Board of Trustees on behalf of The Wolfsonian-FIU: 106–125. ISSN0888-7314. JSTOR1503985.