Main paper
Nishikawa, K., J.-P. Jiang, M. Matsui, and Y.-M. Mo. 2011. Unmasking
Pachytriton labiatus (Amphibia: Urodela: Salamandridae), with description
of a new species of Pachytriton from Guangxi, China. Zoological Science 28
(6):453-461.
Nishikawa, K., M. Matsui, et al. 2012. Molecular phylogeny and biogeography
of caecilians from Southeast Asia (Amphibia, Gymnophiona,
Ichthyophiidae), with special reference to high cryptic species diversity in
Sundaland. Molecular Phylogenetics and Evolution 63 (3):714-723.
Nishikawa, K., M. Matsui, and P. Yambun. 2012. A new unstriped Ichthyophis
(Amphibia: Gymnophiona: Ichthyophiidae) from Mt. Kinabalu, Sabah,
Malaysia. Current Herpetology 31(2):67-77.
Nishikawa, K., W. Khonsue, P. Pomchote, and M. Matsui. 2013. Two new
species of Tylototriton from Thailand (Amphibia: Urodela: Salamandridae).
Zootaxa 3737(3):261-279.
Nishikawa, K. and M. Matsui. 2014. Three new species of the salamander
genus Hynobius (Amphibia, Urodela, Hynobiidae) from Kyushu, Japan.
Zootaxa 3852 (2):203-226.