http://donsmaps.com/animals.html

http://phys.org/news/2011-10-evidence-domestication-dogs-paleolithic-period.html

http://www.sciencedirect.com/science/article/pii/S0305440311003499

http://archaeology.about.com/od/domestications/qt/dogs.htm

http://archaeology.about.com/od/domestications/qt/European-Paleolithic-Dogs.htm

http://www.nbcnews.com/id/27240370/ns/technology_and_science-science/t/worlds-first-dog-lived-years-ago-ate-big/#.U5-H75RdWj5

http://www.historyworld.net/wrldhis/plaintexthistories.asp?historyid=ab57

http://www.pbs.org/wnet/nature/episodes/dogs-that-changed-the-world/what-caused-the-domestication-of-wolves/1276/

http://dienekes.blogspot.com/2012/01/paleolithic-siberian-domestic-dog.html

http://archive.archaeology.org/1009/dogs/

http://www.newscientist.com/article/dn24581-wolves-turned-into-dogs-by-european-huntergatherers.html#.U5-IV5RdWj5