Jajko czy kura (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Jajko czy kura" in Polish language version.

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cnn.com

CNN (May 26, 2006). „Chicken and egg debate unscrambled”. CNN.com. http://www.cnn.com/2006/TECH/science/05/26/chicken.egg/. Retrieved 2008-02-09.

HowStuffWorks. „Which came first, the chicken or the egg?”. HowStuffWorks. http://science.howstuffworks.com/question85.htm. Retrieved 2008-02-09.

Eriksson J, Larson G, Gunnarsson U, Bed’hom B, Tixier-Boichard M, et al. (January 23, 2008). „Identification of the Yellow Skin Gene Reveals a Hybrid Origin of the Domestic Chicken”. PLoS Genetics, e10.eor preprint: e10. doi:10.1371/journal.pgen.1000010.eor. http://genetics.plosjournals.org/perlserv/?request=get-document. Retrieved 2008-02-20.