(en) Suzuki , T., Yuasa , H., Machida , Y. (1996). Phylogenetic position of the Japanese river otter Lutra nippon inferred from the nucleotide sequence of 224 bp of the mitochondrial cytochrome b gene. Zoological Science 1996 (13): 621–626. PMID: 8940916. DOI:10.2108/zsj.13.621.
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(en) Suzuki , T., Yuasa , H., Machida , Y. (1996). Phylogenetic position of the Japanese river otter Lutra nippon inferred from the nucleotide sequence of 224 bp of the mitochondrial cytochrome b gene. Zoological Science 1996 (13): 621–626. PMID: 8940916. DOI:10.2108/zsj.13.621.
