@article {1793,
	title = {The ascidians of the Japan Sea. II},
	journal = {Publications of the Seto Marine Biological Laboratory},
	volume = {35},
	year = {1991},
	pages = {25-170},
	author = {Nishikawa, T.}
}
@article {1761,
	title = {Ascidians from the Gilbert and Solomon Islands and Nauru I.  Perophoridae, Ascidiidae, Corellidae},
	journal = {Proceedings  of the Japanese Society of Systematic Zoology},
	volume = {32},
	year = {1986},
	pages = {30-78},
	author = {Nishikawa, T.}
}
@article {1753,
	title = {Some ascidians collected in the vicinity of Shimoda, Izu Peninsula, middle Japan},
	journal = {Memoirs of the National Science Museum},
	volume = {15},
	year = {1982},
	pages = {203-212},
	author = {Nishikawa, T.}
}
@article {1706,
	title = {Contributions to the Japanese ascidian fauna XXIX. Notes on some Clavelinids from the Japanese waters},
	journal = {Publications of the Seto Marine Biological Laboratory},
	volume = {23},
	year = {1976},
	pages = {63-82},
	author = {Nishikawa, T. and Tokioka, T.}
}
@article {1695,
	title = {Contributions to the Japanese ascidian fauna.  XXVI. Notes on simple ascidians commonly found in the waters near the Sabiura Marine Park Research Laboratory},
	journal = {Publications of the Seto Marine Biological Laboratory},
	volume = {22},
	year = {1975},
	pages = {217-222},
	author = {Nishikawa, T. and Tokioka, T.}
}
@article {1694,
	title = {Contributions to the Japanese ascidian fauna XXVII. Some ascidians from Okinawa, with notes on a small collection from Hong Kong},
	journal = {Publications of the Seto Marine Biological Laboratories},
	volume = {22},
	year = {1975},
	pages = {323-341},
	author = {Tokioka, T. and Nishikawa, T.}
}
