GPS Based Daily Activity Patterns in European Red Deer and North American Elk (Cervus elaphus): Indication for a Weak Circadian Clock in Ungulates (англ.) // PLoS One : journal. — Vol. 389. — doi:10.1371/journal.pone.0106997. — PMID25208246. — PMCPMC4160215.
GPS Based Daily Activity Patterns in European Red Deer and North American Elk (Cervus elaphus): Indication for a Weak Circadian Clock in Ungulates (англ.) // PLoS One : journal. — Vol. 389. — doi:10.1371/journal.pone.0106997. — PMID25208246. — PMCPMC4160215.