[[VR]] adalah seorang anak yang bernama asli Vio Rangga Wardana, yang berkewarganegaraan [[Indonesia]] , media sosial instagram : @Viorangga_Real_Account
* [http://www.hudsonfla.com/thesis.htm Tsiolkovsky's Imperative in the 21st Century] Academic paper
* [http://phillumeny.onego.ru/labels/russian/space/page2/page2.html Virtual Matchbox Labels Museum - Russian labels - Space - Page 2 - Konstantin Tsiolkovsky] Historic images
* [http://www.russianspaceweb.com/tsiolkovsky.html Tsiolkovsky] from Russianspaceweb.com
* [http://www.spaext.com/info/tsiolkovsky/index.html Spaceflight or Extinction: Konstantin Tsiolkovsky] Excerpts from "The Aims of Astronautics", ''The Call of the Cosmos''
* [http://www.astronautix.com/articles/theceage.htm The Foundations of the Space Age]
