Analysis of information sources in references of the Wikipedia article "Pika" in Estonian language version.
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: CS1 hooldus: mitu nime: autorite loend (link)[alaline kõdulink] "On the generality of a cilmate-mediated shift in the distribution of the America pika (Ochotona princeps)". 1.september, 2011.{{netiviide}}
: CS1 hooldus: mitu nime: autorite loend (link) "Variation in pika(Ochotona collaris, O. princeps) vocalizations within and between populations". 2009.