Suzuki T., Yuasa H., Machida Y. Phylogenetic position of the Japanese river otter Lutra nippon inferred from the nucleotide sequence of 224 bp of the mitochondrial cytochrome b gene (англ.) // Zoological Science[англ.] : journal. — 1996. — Vol. 13, iss. 4. — P. 621—626. — ISSN0289-0003. — doi:10.2108/zsj.13.621. — PMID8940916.
Waku D. and Sasaki T. Evolutionary History of the Extinct Otter Lived in Japanese Islands (англ.) // Advanced Techniques in A Biology & Medicine. — 2016. — Vol. 4, no. 4. — P. 1—3. — ISSN2379-1764. — doi:10.4172/2379-1764.1000189.
Suzuki T., Yuasa H., Machida Y. Phylogenetic position of the Japanese river otter Lutra nippon inferred from the nucleotide sequence of 224 bp of the mitochondrial cytochrome b gene (англ.) // Zoological Science[англ.] : journal. — 1996. — Vol. 13, iss. 4. — P. 621—626. — ISSN0289-0003. — doi:10.2108/zsj.13.621. — PMID8940916.
Suzuki T., Yuasa H., Machida Y. Phylogenetic position of the Japanese river otter Lutra nippon inferred from the nucleotide sequence of 224 bp of the mitochondrial cytochrome b gene (англ.) // Zoological Science[англ.] : journal. — 1996. — Vol. 13, iss. 4. — P. 621—626. — ISSN0289-0003. — doi:10.2108/zsj.13.621. — PMID8940916.
Suzuki T., Yuasa H., Machida Y. Phylogenetic position of the Japanese river otter Lutra nippon inferred from the nucleotide sequence of 224 bp of the mitochondrial cytochrome b gene (англ.) // Zoological Science[англ.] : journal. — 1996. — Vol. 13, iss. 4. — P. 621—626. — ISSN0289-0003. — doi:10.2108/zsj.13.621. — PMID8940916.
Waku D. and Sasaki T. Evolutionary History of the Extinct Otter Lived in Japanese Islands (англ.) // Advanced Techniques in A Biology & Medicine. — 2016. — Vol. 4, no. 4. — P. 1—3. — ISSN2379-1764. — doi:10.4172/2379-1764.1000189.