@article {401, title = {Ein neuer Fall von der Ausstossung der Eingeweide bei den Ascidien}, journal = {Annotationes Zoologicae Japonensis}, volume = {9}, year = {1918}, pages = {393-397}, author = {Oka, A.} } @article {76, title = {Ascidians from the Philippines and adjacent waters}, journal = {United States National Museum Bulletin 100}, volume = {1}, number = {2}, year = {1918}, pages = {49-174}, chapter = {49}, author = {Van Name, W.G.} } @article {326, title = {Die ptychobranchen und diktyobranchen Ascidien des Westlichen Indischen Ozeans}, journal = {Jahrbuch der Hamburgischen Wissenchaftlichen Anstalten}, volume = {35}, number = {Supplement 2}, year = {1918}, pages = {1-73}, author = {Michaelsen, W.} }