to the Space Shuttle, 2007.Grahn, Sven. Sputnik-2, more news from distant history. Retrieved September 1, 2004.Mars Exploration Rover Mission: Opportunity arrives at "Vostok" සංරක්ෂණය කළ පිටපත 2014-06-20 at the Wayback Machine. Retrieved March 24, 2005.NSSDC Master Catalog: Sputnik 2 (2003-11-26). Retrieved September 1, 2004.On This Day, November 3 – 1957: Russians launch dog into space. BBC News. Retrieved September 1, 2004.Soviet Fires New Satellite, Carrying Dog; Half-Ton Sphere Is Reported 900 Miles Up (November 3, 1957). New York Times.Whitehouse, David (October 28, 2002). First dog in space died within hours, BBC News Online.Zak, Anatoly (November 3, 1999). The True Story of Laika the Dog. space.com.බාහිර සබැදි[සංස්කරණය]විකිඋද්ධෘත සතුව පහත තේමාව සම්බන්ධයෙන් උද්ධෘත එකතුවක් ඇත: ලයිකා ලයිකා හා සබැඳි මාධ්‍ය විකිමාධ්‍ය කොමන්ස් හි ඇත.History of Sputnik MissionsSputnik 2 at AstronautixOriginal New York Times front page article, November 3, 1957 (via dogsinthenews.com) ස