"Auk" 122 (3): 949-965. with Russian abstract DOI: 10.1642/0004-8038(2005)122[http://mercury.bio.uaf.edu/~kevin_mccracken/reprints/auk-122-949.pdf PDF fulltext.
with Russian abstract DOI: 10.1642/0004-8038(2005)122[http://mercury.bio.uaf.edu/~kevin_mccracken/reprints/auk-122-949.pdf PDF fulltext.