- ermakvagus.com Europe/Russia/penza.htmlOn the territory of Penza there is a botanical garden named after I. I. Sprygin (created in 1917), divided into three sections: dendrological (about 230 plant species)...
- PenzaNews.ru en/archive/2015/09/15The official opening ceremony of the Japanese garden located at the Sprygin Penza State University botanical garden was held on Tuesday, September 15.
- penzacitylibblog.ru index.php/dlya-molodezhi/item…
- pguas.ru images/pdf/nauka/nauchnie_meropriyatiya/…The article discusses the typology, history of Botanical gardens, as well as a brief reference about the Penza Botanical garden named after I.I. Sprygin.
- http://ssc.smr.ru media/journals/fito/2023/01_01.pdfС. 24–29. Scientific heritage of ivan ivanovich sprygin. L.A. Novikova. Penza State University 40, Krasnaya str., Penza, 440026, Russia.Bulunamadı: named
- publications.hse.ru pubs/share/direct/…
- peoplepill.com i/ivan-sprygin
- onlineexpo.lv en/otdykh-leisure/exponents/ivan-i.…